Possible to install CUDA layer without driver on a ATI powered machine? Having ATI and Nvidia in teh

I’m using a HD4870x2 on Vista x64 and I want to buy a second card (Nvidia) to use exclusively for folding. I’ve read that it’s not possible to have both cards working fully on the same machine undervista because it doesn’t like different drivers, I was wondering if there’s a way to install only CUDA for the Nvidia card, making it functional for folding without having to install the whole driver?

any help would be appreciated…

no, it is not possible. CUDA makes use of the driver.