As some of you know, Anti-Aliasing cannot be enables via in-game options menu, i hear that nVidia fixed this early but ATI added a hotfix soon after but forcing Anti-Aliasing on CCC doesn't work for me, i also tried forcing AA with ATI Tray Tools, but that did not work either. I have a ATI Mobility HD 5470.
I don't know if the 5470 perhaps doesn't support it, but if you really did force it through CCC then it will work. Only thing is, with ATI the performance drop is pretty significant and I highly doubt you'll get useable framerates with your card.
I get over 60 fps with shadows, shaders and lighting (1366x768). I forced it through CCC and i can assure you, it didnt work. Maybe the 5470 doesn't support it, well that sucks, i cannot play a game without anti-aliasing, the jaggies everywhere gives me a headache.