Ændring af enkel login modul

Hej, jeg har et Joomla modul (Open Source) som jeg ønsker en mindre forandring til.
Modulet er et login modul der åbner et nyt site og samtidig logger ind på sited.
ØNSKER: Jeg vil gerne kunne åbne 3 sites samt logge ind på disse sites med samme username samt samme password. Er der en der kan hjælpe mig?
Scriptet ser sådan ud:
<?php
/**
* @version $Id: mod_jflogin.php Wed Apr 05 10:46:26 WST 2006 shaynebartlett
* @package J!FAQ
* @copyright Copyright (C) 2005 theJ!factory. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
* J!Login is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

// NO DIRECT ACCESS
defined( '_VALID_MOS' ) or die( 'Restricted access' );

$return = mosGetParam( $_SERVER, 'REQUEST_URI', null );
// converts & to &amp; for xtml compliance
$return = str_replace( '&', '&amp;', $return );

$url = $params->def( 'url', $return );
$user_label = $params->def( '_user', $return );
$user_field = $params->def( 'user', $return );
$pass_label = $params->def( '_pass', $return );
$pass_field = $params->def( 'pass', $return );
$login = $params->def( 'login', $return );
$class = $params->def( 'moduleclass_sfx', $return );
?>

<div title="JF login" align="left">
<form action="<?php echo $url; ?>" target="_blank" method="post">
        <label for="<?php echo $user_field; ?>"><?php echo $user_label; ?></label>
        <br />
        <input accesskey="U" id="<?php echo $user_field; ?>" tabindex="1" name="<?php echo $user_field; ?>" type="text" alt="username" size="20" class="inputbox<?php echo $class; ?>"/>
        <br />
        <label for="<?php echo $pass_field; ?>"><?php echo $pass_label; ?></label>
        <br />
        <input accesskey="P" id="<?php echo $pass_field; ?>" tabindex="2" name="<?php echo $pass_field; ?>" type="password" class="inputbox<?php echo $class; ?>" alt="password" size="20"/>
        <br />
        <input tabindex="3" type="submit" name="Submit" value="<?php echo $login; ?>" class="button<?php echo $class; ?>" />
</form>
</div>

NB: Der er også en xml fil med, men denne er normalt kun til brug ved installering af moduler.