I have 6600GT...installed these drivers few weeks ago,the 78.11 from Forceware
http://downloads.guru3d.com/download.php?det=1162 best drivers i found so far..makes Operation Flashpoint run sweet and if it can do that they must be great(not because of the gfx quality...just its "uniqueness?*!*?!")...no probs with SH3 either...check the discussion forum for these at guru3d..all the 6600GT users and most the 6800 are good with them.Regards.(it says they for laptops but that not the case...i run desktop,Athlon2500+XP,1gbDDR RAM, 6600GT).