Hey guys. I'm glad you kept a back up of the bios mate. It's pretty hard to kill one of these completely, but a defective bios will lead to loads of crap on the screen, or even worse, having to flash without any display at all.
There's a few things that need to be changed with nibitor. At the top of the first screen there is the manufacturer and the name of the card. Evga and fx 3700 works for me here, as does nvidia with fx 3700. Since evga don't make this card, I'm pretty sure its an identifier things like dxdiag use rather than what drivers look at.
So in more detail, and with screenshots at last, here's what to do. The top half has Device: Nvidia PCI-E 8800 GT or similar in it. Change this to Nvidia pci-e quadro fx3700
Next, change vendor to nvidia to be safe, or leave as your card manufacturer if you like. Not properly tested but made no difference to benchmarks.
Below this are the more exciting things. Clockrates are 675 / 1600 / 975 for the card the original guy used. On mine they're 650 / 1520 / 950 I believe, I'd suggest leaving them at whatever your 8800 is set to (until you overclock the fx 3700
)
Leave Voltages, Timings, Temperatures the hell alone
Under adv info (this is the main part)
Device ID 8800GT is 0611 but the FX3700 is 061A
The other three should be left alone, if using nvidia as vendor
10DE
053C
2301
are likely values
Evga has sub vendor ID of 3842 instead of 10DE
I presume sub system is the hardware identifier, device id is where the drivers look, and sub vendor id (which changes when you change the vendor at the top) is what software look at to identify your brand. This might matter with overclocking tools, evga precision might only work if the sub vendor id is 3842
Finally under boot settings, OEM signon, change GeForce 8800 GT VGA BIOS to Quadro FX 3700 VGA BIOS or whatever else takes your fancy.
As a summary, here
http://rapidshare.com/files/160384434/aquamac_Quadro_3700_Roms.zip
Are examples to work from. Change Device ID to 061A under adv info tab, and device to the fx3700 at the top. This (I believe) is sufficient by itself.
Here is four images of nibitor 5.0, showing the differences between the two bios's

I reckon that should do you. Sorry I've been away for a bit, life gets in the way of computers sometimes
p.s. that's exactly what dos should have looked like, I'm pretty sure your problem is the bios. Did you try just using the ones from rs? Worked for me out of the box, all the rest is me just trying to work backwards to find out what he did
There's a few things that need to be changed with nibitor. At the top of the first screen there is the manufacturer and the name of the card. Evga and fx 3700 works for me here, as does nvidia with fx 3700. Since evga don't make this card, I'm pretty sure its an identifier things like dxdiag use rather than what drivers look at.
So in more detail, and with screenshots at last, here's what to do. The top half has Device: Nvidia PCI-E 8800 GT or similar in it. Change this to Nvidia pci-e quadro fx3700
Next, change vendor to nvidia to be safe, or leave as your card manufacturer if you like. Not properly tested but made no difference to benchmarks.
Below this are the more exciting things. Clockrates are 675 / 1600 / 975 for the card the original guy used. On mine they're 650 / 1520 / 950 I believe, I'd suggest leaving them at whatever your 8800 is set to (until you overclock the fx 3700

Leave Voltages, Timings, Temperatures the hell alone
Under adv info (this is the main part)
Device ID 8800GT is 0611 but the FX3700 is 061A
The other three should be left alone, if using nvidia as vendor
10DE
053C
2301
are likely values
Evga has sub vendor ID of 3842 instead of 10DE
I presume sub system is the hardware identifier, device id is where the drivers look, and sub vendor id (which changes when you change the vendor at the top) is what software look at to identify your brand. This might matter with overclocking tools, evga precision might only work if the sub vendor id is 3842
Finally under boot settings, OEM signon, change GeForce 8800 GT VGA BIOS to Quadro FX 3700 VGA BIOS or whatever else takes your fancy.
As a summary, here
http://rapidshare.com/files/160384434/aquamac_Quadro_3700_Roms.zip
Are examples to work from. Change Device ID to 061A under adv info tab, and device to the fx3700 at the top. This (I believe) is sufficient by itself.
Here is four images of nibitor 5.0, showing the differences between the two bios's

I reckon that should do you. Sorry I've been away for a bit, life gets in the way of computers sometimes

p.s. that's exactly what dos should have looked like, I'm pretty sure your problem is the bios. Did you try just using the ones from rs? Worked for me out of the box, all the rest is me just trying to work backwards to find out what he did