Maybe someone can help me with this. I have a
Geforce 7950
Radeon HD 2600 Pro
and a Radeon HD 3650
Are any of these cards able to support the game? I'm just not sure.

If they don't, could I get some advice as to what will. My desk top is getting a bit old and I don't have the money for a new one now, or a total upgrade. My PC uses the AGP sloted cards. Any help would be greatly apreciated.

I would try that 7950 first. That card should run the game very well even tho its listed as a minimual required card. the 7950 can outperform even my 8600m GT I have in my computer. So just use your 7950 if your can. The 2600 and 3650 Should be able to run it but they are more mid range cards unlike the nvidia one. So expect performance to be middle of the range.

Thanks. I was really hoping that the 7950 was going to work.

Yeah I know because my friend has a Dell XPS 1710 and when we play Call of Duty Modern Warfare 2 I can run only on mid level while he is on high (same goes for crysis)