How to Display Child Forums Order Randomly?

[Sidewindr]

We have the option of specifying an implicit sort order for subforums but I have a sponsors area where they have their own sub forums and believe it or not they get upset if someone elses forum appears above theirs always.

I had a hack in the olve vb3.0 where I replaced the following code in includes/functions_forumlist.php

                        ksort($iforumcache["$parentid"]);

with

                if ($parentid == 40) {
                        srand ((float)microtime()*1000000);
                        shuffle($iforumcache["$parentid"]);
                } else {
                        ksort($iforumcache["$parentid"]);
                }

This worked well (forum 40 being the parent forum for the sponsor forums) however I cannot find anything similar to it in vb351 .. Help!!