define("IPB_TABLE_PREFIX", "ibf_");
define("IPB_VERSION", "2");
AddEventHandler("main", "OnUserLoginExternal", Array("__IPBAuth", "OnUserLoginExternal"));
AddEventHandler("main", "OnExternalAuthList", Array("__IPBAuth", "OnExternalAuthList"));
class __IPBAuth
{
    function OnUserLoginExternal(&$arArgs)
    {
        extract($arArgs);
        ////////// <settings> ////////////
        $table_user = IPB_TABLE_PREFIX."members";
        $table_converge = IPB_TABLE_PREFIX."members_converge";
        $groups_map = Array(
            /*'IPB Group ID' => 'Local Group ID',*/
            '4' => '1'
            );
        ////////// </settings> ////////////
        global $DB, $USER, $APPLICATION;
        if(IPB_VERSION == '1')
        {
            $strSql = "SELECT * FROM ".$table_user." WHERE name='".$DB->ForSql($login)."' AND password='".md5($password)."'";
        }
        else
        {
            $strSql =
                "SELECT t1.* ".
                "FROM ".$table_user." t1, ".$table_converge." t2 ".
                "WHERE t1.name='".$DB->ForSql($login)."' ".
                "    AND t1.email = t2.converge_email ".
                "    AND t2.converge_pass_hash = MD5(CONCAT(MD5(t2.converge_pass_salt), '".md5($password)."'))";
        }
.............
.... итд