Just a small update for anyone who caes. I installed a 2GB RAM stick today (bringing my total RAM to 3GB), and actually the difference is noticeable. The settings are still on low but the framerate has increased noticeably. It's still not blazing fast, but the difference is noticeable. My next step is to replace the CPU if I can find a cheap enough quadcore. But that's going to be pretty far off.
I tried that. It doesn't work. It actually slowed the game down considerably.
