I'll get to the point immediatly: I'm unable to alter and/or deactivate anti-aliasing, and as far as I can tell, anisotropic filtering as well. Changing the settings in the ingame menu has no effect on the game, not after restarting either. Changing the settings in the control panel of my GPU doesn't work either, nor editing the .ini file. It's still smooth, unjagged and beautiful ingame.. but also slow and sluggish! I've downloaded and applied every patch, tried removing them, did a clean install.. and still no effect! Please, help me, for I too want to play this great game with at least a bit acceptable framerate, and this isn't working! 
  
My specs:  
AMD Athlon 2000+, ~1.8 Ghz 
ATi RADEON 9800Pro, 128 MB with Catalyst 5.11 
768 MB DDR2 RAM 
Nvidia nForce Mb 
  
Thanks in advance, Tom 
  
PS. I'm a new guy