[Andreas]

IMHO, the easiest way would have been:

In forumdisplay.php COMMENT OUT

PHP Code:

if ($foruminfo['parentid'] == -1)
{
        $url = "$vboptions[forumhome].php?$session[sessionurl]";
}
else
{
        $url = "forumdisplay.php?$session[sessionurl]f=$foruminfo[parentid]";
} 


After this INSERT

PHP Code:

$url = "online.php?$session[sessionurl]";