About the driver:
I have checked my card, my version is
4.12.01.0631
(October 2000)
It was a driver provided by the manufacture of the card though (asus), not from Nvidia, also I had to google the driver since it was not available on the asus site.
Finding the right driver on the Nvidia site is not really easier. It is still saying 'Geforce and TNT2' in the list of graphics card, but the driver is actually only working for Geforce3+.
It seems following driver should work:
http://www.nvidia.com/object/win9x_71.84.html
I don't know why they don't make older drivers available, there are still drivers for Riva 128 but not for Riva TNT (1).
Here seems to be a download for the driver version I have:
http://www.gpdownloads.co.nz/dl.dyn/Files/2524.html
But like I said, it is better to get the one from the manufacturer of the card. Also you need to uninstall the old driver first.
About fixing it without changing the driver: Do you get any errors in the F2 log window? Eventually post the content of graal4console.log, which should be in the Graal folder.