require('/path/to/framework/YiiBase.php');

$config = require('/path/to/protected/config/main.php');
$session = YiiBase::createComponent($config['components']['session']);

$session = new CHttpSession();

require('/path/to/framework/YiiBase.php');
$config = require('/path/to/configs_directory/main.php');
Yii::createWebApplication($config);

$userInfo = User::model()->findByPk(array('id'=>Yii::app()->user->id));
$user = $userInfo->username;
$password = md5($this->userInfo->password);

Yii::app()->session['usename']  = $user;
Yii::app()->session['password'] = $password;