Yeah, x64-related problem. I had mf.dll in %SystemRoot%\System32, not %SystemRoot%\SysWOW64, where it should have been on a 64-bit system. Corrected my stupidity, and it works fine.

Syuusuke - you're right: there's about two frames per second worth of difference. The game averages 17fps under XP and a meager six under Vista. I used Fraps to benchmark both of them. This, of course, is with the LoD set to "Low", no antialiasing, and so forth.

So, my next question is... Is there any equivalent to switches like CE's -vidmode, -safemode, and so forth? I'm alright running it at the minimum 800x600, but if I can get a few more frames out of 640x480 I wouldn't mind doing so.