I don't think anyone knows exactly which Rom sets to use but this thread might help: http://www.gp32x.de/board/index.php?/topic/44848-mame-running-on-pandora-videos-inside/
Zodttd says he has the full .37 Mame set so that's a good start but I remember somewhere later in that thread that he was trying to get the near the later sets for compatibility. Early stuff is guaranteed and maybe just maybe Tekken Tag I hope.