Dumb mistake, enabled pixel processor quad in 6600 gt, help

I used RivaTuner and enabled a pixel processor quad in 6600 gt. It was dumb but I did it out of curiosity to see what happens.

Now the system crashes before window's login screen . I can go to safe mode and remove the display drivers, then I can go back to normal mode, but during driver installation the system crashes again.

The problem is I can't run RivaTuner to restore the graphic card unless the system loads the drivers and the system crashes as soon as it loads the drivers.

What can I do now guys? Is there a way to manually tell RivaTuner that this is a 6600 gt and it accepts it? Did anyone had the same problem before?

Thanks for the swift response.

I can get into RivaTuner in safe mode or when the driver's are uninstalled but it does not display the options for graphic card. For example the option for changing the refresh rate is available but the options for overclocking or restoring the card from what I have done is not available.

"Try uninstalling "Nvstrap" instead of setting the pipes back to what they should be."

I will try to do this but please tell me what does uninstalling "Nvstrap" has to do with my problem and what should I expect to happen when I do this?

By the way, Is there Anyone who knows a way to flash the graphic card's bios through DOS environment or in safe mode? I think if I can restore the original BIOS then the problem is solved.

Did you try system restore?

If you can, restore you computer to a states BEFORE you started having the problem.

"how is it that you unlocked anything on a 6600gt? they only have 8 pipelines and they're all enabled."

That is why it is a dumb mistake. ;-)