Okay -.- I just installed my 9600GSO.
Now I'm working on installing the GPU client for BOTH gpus...I'll try to find a guide somewhere, but I'm sure it can't be that hard. =) Soon I'll have my e6750@3.2ghz and a 9600GSO dual slot cooler and a 8800GT 512mb all folding ^^ 
And as soon as I get a hdd for my server computer I'll have a 6000+ running and an ATI Radeon HD 3200 (not sure what good this will do yet though haha).
Thanks =)
Edit: Installed two gpu clients using this guide -> http://forums.pureoverclock.com/showthread.php?t=3929 But I don't think it's working at all... -.- Time to keep looking.
Definately not set up right...both of my displays showed a 9600GSO as the processing unit, which means my 8800GT magically disappeared. To add to the issues, EVGA precision tool doesn't allow for two graphics cards. How silly is that. So now I have to find a way to re-overclock my 8800GT, save the settings on that, then overclock the 9600GSO, and then learn how to run two seperate F@h clients on each one.
This is silly.
Okay.. After about 2 hours of messing with this, I now have my 9600GSO folding and cannot, for the life of me, get the 8800GT up. I followed all the instructions to a T listed here :
http://folding.stanford.edu/English/WinGPUGuide#ntoc2 in the multi-gpu section. Didn't miss a single step, and have the latest CUDA drivers. Well, my gpu assignments look like the attached file, and when I start the first core (at -gpu 0, SHOULD be the 8800GT), it shows up in the display as the 9600GSO). Well, I think maybe somethings messed up, start my next one (at gpu -2 because of the display setup), and it gives me this error message (also attached). So, I set it to gpu -1, and it starts, but is assigned to the 9600GSO as well. I even run the -forcegpu nvidia_g80, which lets it start at gpu 2, but also shows up as 9600GSO in the display, and when I hove over the systray icon, it says closed connections.
I don't understand it at all ><
Another interesting point. When my "9600GSO" is running, my 8800GT temps go up. >< But my 8800GT's PPD, if it is my 8800GT, used to be 5.2k, and now it's 3.8k? Doesn't make sense, I'm tempted to say screw it and unplug the 9600GSO >< It just seems like there is a simple solution I can't see.
And another thing that is frustrating -> Evga precision won't recognize both cards. This company produces so many "dual card" solutions but their tuning tool only supports one card at a time....give me a break evga.
Yet another edit: Could it be that when I first plugged in the 9600GSO it auto-installed the drivers? I've updated the drivers since then (first updated to the latest 9600GSO driver, then the latest physX driver, then the CUDA driver), but I don't know.
9600GSO driver : 7.15.11.7781
8800GT driver : 7.15.11.7781
I guess I should post this in the software support section eh. Meh.