@Dark_God - It is possible to flash the BIOS to make it run on a PC. You need to find a BIOS that is made to do this though.  Unfortunately, I do not know where one lives as I have not needed to attempt this before.

I would imagine that nearly any BIOS flash program can be used (even apps like ATIFlash or even ones for nvidia cards).  At the end of the day they just flash one BIOS to another.  However, if you can get hold of a BIOS flasher deisgned for 3dfx cards in mind, I would recommend that.

DISCLAIMER: Be advised, that you hold responsibility for any flashing one to your graphics card in the event that it goes pair shaped, and you screw it up.  Instructions usually are included with each piece of flashing software.