Set up multiple database in Zend Framework (v1.12)

gistfile1.php

1) Setup multiple DB in application.ini like this:
; Database 1
resources.multidb.db1.adapter  = pdo_mysql
resources.multidb.db1.host     = 127.0.0.1
resources.multidb.db1.username = root
resources.multidb.db1.password = vertrigo
resources.multidb.db1.dbname   = my_db_1
resources.multidb.db1.default = true

; Database 2
resources.multidb.db2.adapter  = pdo_mysql
resources.multidb.db2.host     = 127.0.0.1
resources.multidb.db2.username = root
resources.multidb.db2.password = 
resources.multidb.db2.dbname   = my_db_2
resources.multidb.db2.port = 33066
resources.multidb.db2.charset = utf8

2) Add the method bellow to Bootstrap.php
$this->bootstrap('multidb');
$multidb = $this->getPluginResource('multidb');
$db1 = $multidb->getDb('db1');
$db1->setFetchMode(Zend_Db::FETCH_OBJ);
Zend_Registry::set('db', $db1);
        
$db2 = $multidb->getDb('db2');
$db2->setFetchMode(Zend_Db::FETCH_OBJ);
Zend_Registry::set('db2', $db2);

3) Using difference db adapter in Zend_Db_Table_Abstract
3.1) Setup by __construct method: public function __construct(array('db' => 'db2'));
3.2) Setup by _setAdapter() method: $this->_setAdapter('db2');
3.3) Setup by setOptions() method: $this->setOptions(array('db' => $this->_adapter));
3.4) Setup by setDefaultAdapter() method: self::setDefaultAdapter(Zend_Registry::get('db2'));
3.5) Set value for $this->_db property: $this->_db = Zend_Registry::get('db2');

All done!