I have a P4 2Ghz, with 512MB RAM and a GForce 3 video card with 64MB of RAM.
When I first got the game and installed it, it crashed my video driver twice. Not too tragic, I went out to NVidia's site and downloaded a driver upgrade, installed it, and that fixed that problem.
As time progressed, I found the game to be very sluggish. So, I turned the graphics level down to low and disabled some animations. This helped some but it was still sluggish. Next I went in and looked at my virtual memory. It looked rather lean so I doubled it. The game is running much better now, a tad sluggish, but tolerable.