How slowly is it running? The GeForce4 MX is an older card, so the game probably won't run at a full 60 frames per second, or anything, but it should still be playable. If it's running really reallllly slowly (like one frame every couple seconds), then you might have drivers that don't support OpenGL. You could solve that by searching for drivers that specifically say they support OpenGL.
PSN Name: BaffleCakes