0x004012C5 works for SGSSAA 4x
0x004012A1 works for SGSSAA 4x and 8x but it is blurry.

Both work with the release client. But both require a fair amount of gpu power since this game uses a deferred renderer.

There was a discussion on this thread http://forums.guru3d.com/showthread.php?t=357956 around post 1200ish if I recall.