how to modify display drivers?

I have a Creative GeForce DDR, performed the Quadro surgery and now its a NIVIDA Quadro

Vendor ID still 10DE (which means NVIDIA)
Device ID changed from 0101 to 0103 which is how it distingusihes between a GF or Q, due to the modification.

Anyway, how can I modidy one of the drivers DLL files that contain what hardware to support.

I.e. Elsa Gloria II driver is for Quadro with those little extra feature for AutoCAD etc, but it wouldn't work on a Creative card

So I am thinking of hacking the DLL file and add in the Creative vendor ID, so that it can take advantage of it.

Also Since I modify the card, I would like to FLASH the graphic BIOS so that when it boots it says Quadro instead of GF, where can I get the flasher software and bios update?

I know it changes the core from 120Mhz to 135Mhz, mine worked at 135Mhz anyway, so I am not afraid.

Finally where can I get the original creative bios update and flasher? just incase I want to change it back

because half-life cannot press ESC key or else will shut the display down, hahaha, the the virus from "The NET" showing beautiful Sandra Bullog

Best regards
cx5