The best way to get cool games for this hack is search for them and ask the developer to share the swf with this slight modification in it. The developer get's it's attention by the copyright and url, vb arcade the game + highscore.
If everything goes well i shall add this slotgame:
http://www.tmex.nl/slotmachine/slotmachine.php
It has 117 swf files and is a very nice addon for this hack. The author has the scorebutton (mailed a fla) to let it work with this hack. If this is tested on the server i shall attach them and place it.