[N0ctrnl]

Look at the player.pl file for PoKnowledge. Specifically:

 if($doorid == 25)
        {
                $zonename = "Freeport West";
                if(($client->GetClientVersionBit() & 3)!= 0) #062/Titanium
                {
                        quest::movepc(9,77.31,-660.57,-30.24);
                }
                elsif(($client->GetClientVersionBit() & 4294967264)!= 0) #RoF+
                {
                        quest::movepc(383,-173,-188,-69,192);
                }
                else  #SoF/SoD/UF
                {
                      # quest::popup("$zonename","Send you to the Classic $zonename? $popuptext",6,1);
                      # quest::settimer(6,5);
                      quest::movepc(9,77.31,-660.57,-30.24);
                }
        }

This is determining your client, and then sending you to the old version for old clients and the new version for newer. You can change it to send any of the clients to the old (freportw - zone ID 9) instead of new (westfreeport - zone ID 383)