I just installed and OEM version of Windows XP SP2 on my iMac (late 2007 20" 2ghz). I'm trying to play Tabula Rasa, a MMORPG but the game will only run smoothly with low graphics settings. I tried updating my graphics drivers from the ATI website however the ATI Catalyst Control Center crashes when I try to launch it. Does anyone have any suggestions on system settings, drivers, updates, tweaks etc. on getting the best graphics performance for gaming in Windows XP?