I'm Sorry... But there's not much to do... Try to overclock it, you will gain some fps for sure, but I don't know if it will become playable... Search setfsb in the forum for overclock infos, or PM me. However you should try to use games from 1998-2002 ages. For example: Serious Sam 2 in openGL, with IEGD, will work well!
The GMA500 Guru: ask me for every video problem! (Or if you desire a perfect video experience)
Win Xp, Driver .1016, Full Hd Youtube Working; Win7, Driver .2019
Dell Mini 10, HDD Momentus 7200.2 160gb (best 2.5" access time