I have found the decision
Search in forum/portal/modules/portal_mchat.php
public function get_template_center($module_id)
{
global $config, $template, $phpbb_root_path, $phpEx, $auth, $user, $cache, $db;

if(!defined('MCHAT_INCLUDE'))
{
define('MCHAT_INCLUDE', true);
}
if(!function_exists ...

Tell how to make a chat not in the central column, and in right?