Shloeb
In the zone
Ya i tried this last night. As it was too late so i couldn't tell u. The AA is working but i think that the HD or Bloom effect is gone. I'll post the screen shots today as i am right now in college. But i personally don't like any game without AA as i hate those jaggy lines even if i have to lower other settings. I haven't checked the frame rates though. Previously it was 80+ and i'll check it now and post here with screenshot.I personally haven't tried this out myself as I feel this game looks stunning even without AA.
Here's something which I found on TweakGuides forums long back:
Source:*forums.tweakguides.com/showpost.php?p=71963&postcount=278
See if this works for you.I can't guarantee the results but they have seen it work on Nvidia cards with noticeable difference & of course massive frame drops.No idea about it working fully on an ATI card.