Try adding SET FX_GLIDE_SWAPINTERVAL=2 environment variable to see if it does the trick. What will do is that the screen will be swapped every two vsyncs, meaning that the framerate will be capped to the half of the screen refresh rate (30 FPS if it is 60 Hz).

1GHz and a GeForce 4 will definitely be too fast for B.A.T.

Try disabling internal cache either in BIOS or using a DOS utility and play in DOS.

I used to play it just fine in my Pentium 133MHz with a S3 Virge card. Runs perfectly.

You could try using http://www.oldskool.org/pc/throttle/DOS/ and see if this helps out your speed problems.