Advice needed on multiple video cards

[flapclock]

Hi, first up - thanks for the huge amount of effort and data on the project from all involved, it's a beautiful thing!

I'd like to get 10.6 running on my new i7 930 but I have an ATI HD5970 which I suspect will never be supported by the OS. As a workaround I was wondering whether it was possible to install a second video card for OSX use, while still keeping the HD5970 in the box? I couldn't find any info on it, but has anyone done anything like this in the past?

Thanks!