diff --git a/classes/db/DBsqlite3_pdo.class.php b/classes/db/DBsqlite3_pdo.class.php
new file mode 100644
index 000000000..79e9a38f0
--- /dev/null
+++ b/classes/db/DBsqlite3_pdo.class.php
@@ -0,0 +1,427 @@
+<?php
+    /**
+    * @class DBMysqli
+    * @author zero (zero@nzeo.com)
+    * @brief MySQLi DBMS를 이용하기 위한 class
+    * @version 0.1
+    * @todo mysqli 미구현 (mysql과 같은 처리..)
+    *
+    * mysqli의 prepare, bind param등을 사용하려고 만들었으나....
+    * 문제는 bind_param 시에 mixed var를 eval이 아닌 방법으로 구현할 방법을 찾지 못했음.
+    **/
+
+    class DBMysqli extends DB {
+
+        var $handler = null;
+
+        var $hostname = '127.0.0.1'; ///< hostname
+        var $userid   = NULL; ///< user id
+        var $password   = NULL; ///< password
+        var $database = NULL; ///< database
+        var $prefix   = 'zb'; ///< 제로보드에서 사용할 테이블들의 prefix  (한 DB에서 여러개의 제로보드 설치 가능)
+
+        /**
+         * @brief mysql에서 사용될 column type
+         *
+         * column_type은 schema/query xml에서 공통 선언된 type을 이용하기 때문에
+         * 각 DBMS에 맞게 replace 해주어야 한다
+         **/
+        var $column_type = array(
+            'bignumber' => 'bigint',
+            'number' => 'bigint',
+            'varchar' => 'varchar',
+            'char' => 'char',
+            'text' => 'text',
+            'bigtext' => 'longtext',
+            'date' => 'varchar(14)',
+        );
+
+        /**
+         * @brief constructor
+         **/
+        function DBMysqli() {
+            $this->_setDBInfo();
+            $this->_connect();
+        }
+
+        /**
+         * @brief 설치 가능 여부를 return
+         **/
+        function isSupported() {
+            if(!function_exists('mysqli_connect') || mysqli_get_client_info() < "4.1.00") return false;
+            return true;
+        }
+
+        /**
+         * @brief DB정보 설정 및 connect/ close
+         **/
+        function _setDBInfo() {
+            $db_info = Context::getDBInfo();
+            $this->hostname = $db_info->db_hostname;
+            $this->userid   = $db_info->db_userid;
+            $this->password   = $db_info->db_password;
+            $this->database = $db_info->db_database;
+            $this->prefix = $db_info->db_table_prefix;
+            if(!substr($this->prefix,-1)!='_') $this->prefix .= '_';
+        }
+
+        /**
+         * @brief DB 접속
+         **/
+        function _connect() {
+            // db 정보가 없으면 무시
+            if(!$this->hostname || !$this->userid || !$this->password || !$this->database) return;
+
+            // 접속시도  
+            $this->handler = new mysqli($this->hostname, $this->userid, $this->password, $this->database);
+
+            // 접속체크
+            if(mysqli_connect_error()) $this->is_connected = false;
+            else $this->is_connected = true;
+
+            // mysql의 경우 utf8임을 지정
+            $this->handler->query("SET NAMES 'utf8'");
+        }
+
+        /**
+         * @brief DB접속 해제
+         **/
+        function close() {
+            if(!$this->isConnected()) return;
+            $this->handler->close();
+        }
+
+        /**
+         * @brief 쿼리에서 입력되는 문자열 변수들의 quotation 조절
+         **/
+        function addQuotes($string) {
+            if(get_magic_quotes_gpc()) $string = stripslashes(str_replace("\\","\\\\",$string));
+            if(!is_numeric($string)) $string = $this->handler->real_escape_string($string);
+            return $string;
+        }
+
+        /**
+         * @brief : 쿼리문의 실행 및 결과의 fetch 처리
+         *
+         * query : query문 실행하고 result return\n
+         * fetch : reutrn 된 값이 없으면 NULL\n
+         *         rows이면 array object\n
+         *         row이면 object\n
+         *         return\n
+         **/
+        function _query($query) {
+            if(!$this->isConnected()) return;
+            $this->query = $query;
+
+            $this->setError(0,'success');
+
+            $result = $this->handler->query($query);
+
+            if($this->handler->error) {
+                $this->setError($this->handler->errno, $this->handler->error);
+                return;
+            }
+
+            return $result;
+        }
+
+        /**
+         * @brief 결과를 fetch
+         **/
+        function _fetch($result) {
+            if($this->errno!=0 || !$result) return;
+
+            while($tmp = $result->fetch_object()) {
+                $output[] = $tmp;
+            }
+            if(count($output)==1) return $output[0];
+            return $output;
+        }
+
+        /**
+         * @brief 1씩 증가되는 sequence값을 return (mysql의 auto_increment는 sequence테이블에서만 사용)
+         **/
+        function getNextSequence() {
+            $query = sprintf("insert into `%ssequence` (seq) values ('')", $this->prefix);
+            $this->_query($query);
+            return $this->handler->insert_id;
+        }
+
+        /**
+         * @brief 테이블 기생성 여부 return
+         **/
+        function isTableExists($target_name) {
+            $query = sprintf("show tables like '%s%s'", $this->prefix, $this->addQuotes($target_name));
+            $result = $this->_query($query);
+            $tmp = $this->_fetch($result);
+            if(!$tmp) return false;
+            return true;
+        }
+
+        /**
+         * @brief xml 을 받아서 테이블을 생성
+         **/
+        function createTableByXml($xml_doc) {
+            return $this->_createTable($xml_doc);
+        }
+
+        /**
+         * @brief xml 을 받아서 테이블을 생성
+         **/
+        function createTableByXmlFile($file_name) {
+            if(!file_exists($file_name)) return;
+            // xml 파일을 읽음
+            $buff = FileHandler::readFile($file_name);
+            return $this->_createTable($buff);
+        }
+
+        /**
+         * @brief schema xml을 이용하여 create table query생성
+         *
+         * type : number, varchar, text, char, date, \n
+         * opt : notnull, default, size\n
+         * index : primary key, index, unique\n
+         **/
+        function _createTable($xml_doc) {
+            // xml parsing
+            $oXml = new XmlParser();
+            $xml_obj = $oXml->parse($xml_doc);
+
+            // 테이블 생성 schema 작성
+            $table_name = $xml_obj->table->attrs->name;
+            if($this->isTableExists($table_name)) return;
+            $table_name = $this->prefix.$table_name;
+
+            if(!is_array($xml_obj->table->column)) $columns[] = $xml_obj->table->column;
+            else $columns = $xml_obj->table->column;
+
+            foreach($columns as $column) {
+                $name = $column->attrs->name;
+                $type = $column->attrs->type;
+                $size = $column->attrs->size;
+                $notnull = $column->attrs->notnull;
+                $primary_key = $column->attrs->primary_key;
+                $index = $column->attrs->index;
+                $unique = $column->attrs->unique;
+                $default = $column->attrs->default;
+                $auto_increment = $column->attrs->auto_increment;
+
+                $column_schema[] = sprintf('`%s` %s%s %s %s %s',
+                $name,
+                $this->column_type[$type],
+                $size?'('.$size.')':'',
+                $default?"default '".$default."'":'',
+                $notnull?'not null':'',
+                $auto_increment?'auto_increment':''
+                );
+
+                if($primary_key) $primary_list[] = $name;
+                else if($unique) $unique_list[$unique][] = $name;
+                else if($index) $index_list[$index][] = $name;
+            }
+
+            if(count($primary_list)) {
+                $column_schema[] = sprintf("primary key (%s)", '`'.implode($primary_list,'`,`').'`');
+            }
+
+            if(count($unique_list)) {
+                foreach($unique_list as $key => $val) {
+                    $column_schema[] = sprintf("unique %s (%s)", $key, '`'.implode($val,'`,`').'`');
+                }
+            }
+
+            if(count($index_list)) {
+                foreach($index_list as $key => $val) {
+                    $column_schema[] = sprintf("index %s (%s)", $key, '`'.implode($val,'`,`').'`');
+                }
+            }
+
+            $schema = sprintf('create table `%s` (%s%s) %s;', $this->addQuotes($table_name), "\n", implode($column_schema,",\n"), "ENGINE = MYISAM  CHARACTER SET utf8 COLLATE utf8_general_ci");
+
+            $output = $this->_query($schema);
+            if(!$output) return false;
+        }
+
+        /**
+         * @brief 테이블 삭제
+         **/
+        function dropTable($target_name) {
+            $query = sprintf('drop table `%s%s`;', $this->prefix, $this->addQuotes($target_name));
+            $this->_query($query);
+        }
+
+        /**
+         * @brief 테이블의 이름 변경
+         **/
+        function renameTable($source_name, $targe_name) {
+            $query = sprintf("alter table `%s%s` rename `%s%s`;", $this->prefix, $this->addQuotes($source_name), $this->prefix, $this->addQuotes($targe_name));
+            $this->_query($query);
+        }
+
+        /**
+         * @brief 테이블을 비움
+         **/
+        function truncateTable($target_name) {
+            $query = sprintf("truncate table `%s%s`;", $this->prefix, $this->addQuotes($target_name));
+            $this->_query($query);
+        }
+
+        /**
+         * @brief 테이블 데이터 Dump
+         *
+         * @todo 아직 미구현
+         **/
+        function dumpTable($target_name) {
+        }
+
+        /**
+         * @brief insertAct 처리
+         **/
+        function _executeInsertAct($tables, $column, $pass_quotes) {
+            $table = array_pop($tables);
+
+            foreach($column as $key => $val) {
+                $key_list[] = $key;
+                if(in_array($key, $pass_quotes)) $val_list[] = $this->addQuotes($val);
+                else $val_list[] = '\''.$this->addQuotes($val).'\'';
+            }
+
+            $query = sprintf("insert into `%s%s` (%s) values (%s);", $this->prefix, $table, '`'.implode('`,`',$key_list).'`', implode(',', $val_list));
+            return $this->_query($query);
+        }
+
+        /**
+         * @brief updateAct 처리
+         **/
+        function _executeUpdateAct($tables, $column, $args, $condition, $pass_quotes) {
+            $table = array_pop($tables);
+
+            foreach($column as $key => $val) {
+                // args에 아예 해당 key가 없으면 패스
+                if(!isset($args->{$key})) continue;
+                if(in_array($key, $pass_quotes)) $update_list[] = sprintf('`%s` = %s', $key, $this->addQuotes($val));
+                else $update_list[] = sprintf('`%s` = \'%s\'', $key, $this->addQuotes($val));
+            }
+            if(!count($update_list)) return;
+            $update_query = implode(',',$update_list);
+
+            if($condition) $condition = ' where '.$condition;
+
+            $query = sprintf("update `%s%s` set %s %s;", $this->prefix, $table, $update_query, $condition);
+
+            return $this->_query($query);
+        }
+
+        /**
+         * @brief deleteAct 처리
+         **/
+        function _executeDeleteAct($tables, $condition, $pass_quotes) {
+            $table = array_pop($tables);
+
+            if($condition) $condition = ' where '.$condition;
+
+            $query = sprintf("delete from `%s%s` %s;", $this->prefix, $table, $condition);
+            return $this->_query($query);
+        }
+
+        /**
+         * @brief selectAct 처리
+         *
+         * select의 경우 특정 페이지의 목록을 가져오는 것을 편하게 하기 위해\n
+         * navigation이라는 method를 제공
+         **/
+        function _executeSelectAct($tables, $column, $invert_columns, $condition, $navigation, $group_script, $pass_quotes) {
+            if(!count($tables)) $table = $this->prefix.array_pop($tables);
+            else { 
+                foreach($tables as $key => $val) $table_list[] = sprintf('%s%s as %s', $this->prefix, $key, $val);
+            }
+            $table = implode(',',$table_list);
+
+            if(!$column) $columns = '*';
+            else {
+                foreach($invert_columns as $key => $val) {
+                    $column_list[] = sprintf('%s as %s',$val, $key);
+                }
+                $columns = implode(',', $column_list);
+            }
+
+            if($condition) $condition = ' where '.$condition;
+
+            if($navigation->list_count) return $this->_getNavigationData($table, $columns, $condition, $navigation);
+
+            $query = sprintf("select %s from %s %s", $columns, $table, $condition);
+
+            $query .= ' '.$group_script;
+
+            if($navigation->index) {
+                foreach($navigation->index as $index_obj) {
+                    $index_list[] = sprintf('%s %s', $index_obj[0], $index_obj[1]);
+                }
+                if(count($index_list)) $query .= ' order by '.implode(',',$index_list);
+            }
+
+            $result = $this->_query($query);
+            if($this->errno!=0) return;
+            $data = $this->_fetch($result);
+
+            $buff = new Object();
+            $buff->data = $data;
+            return $buff;
+        }
+
+        /**
+         * @brief query xml에 navigation 정보가 있을 경우 페이징 관련 작업을 처리한다
+         *
+         * 그닥 좋지는 않은 구조이지만 편리하다.. -_-;
+         **/
+        function _getNavigationData($table, $columns, $condition, $navigation) {
+            require_once('./classes/page/PageHandler.class.php');
+
+            // 전체 개수를 구함
+            $count_query = sprintf("select count(*) as count from %s %s", $table, $condition);
+            $result = $this->_query($count_query);
+            $count_output = $this->_fetch($result);
+            $total_count = (int)$count_output->count;
+
+            // 전체 페이지를 구함
+            $total_page = (int)(($total_count-1)/$navigation->list_count) +1;
+
+            // 페이지 변수를 체크
+            if($navigation->page > $total_page) $page = $navigation->page;
+            else $page = $navigation->page;
+            $start_count = ($page-1)*$navigation->list_count;
+
+            foreach($navigation->index as $index_obj) {
+                $index_list[] = sprintf('%s %s', $index_obj[0], $index_obj[1]);
+            }
+
+            $index = implode(',',$index_list);
+            $query = sprintf('select %s from %s %s order by %s limit %d, %d', $columns, $table, $condition, $index, $start_count, $navigation->list_count);
+            $result = $this->_query($query);
+            if($this->errno!=0) {
+                $buff = new Object();
+                $buff->total_count = 0;
+                $buff->total_page = 0;
+                $buff->page = 1;
+                $buff->data = array();
+
+                $buff->page_navigation = new PageHandler($total_count, $total_page, $page, $navigation->page_count);
+                return $buff;
+            }
+
+            $virtual_no = $total_count - ($page-1)*$navigation->list_count;
+            while($tmp = $result->fetch_object()) {
+                $data[$virtual_no--] = $tmp;
+            }
+
+            $buff = new Object();
+            $buff->total_count = $total_count;
+            $buff->total_page = $total_page;
+            $buff->page = $page;
+            $buff->data = $data;
+
+            $buff->page_navigation = new PageHandler($total_count, $total_page, $page, $navigation->page_count);
+            return $buff;
+        }
+    }
+?>