GF has a 3gig intel single core and what im wondering can i install the 64bit ver of windows 7 or dose it have to be the 32bit ver of it?

It all depends what kind it is...you'd have to look at the manufacturing date...If it's a Prescott from 2004 or earlier, then it's only 32bit. If it's a Prescott or later from 2005, then it should be 64bit.

If there is an OS installed on the computer already CPU-Z (CPUID) should be able to show you if it's 32 or 64 bit.

x86-64 is what yer looking for.

Thanks never even thought of using CPU-Z to find out, duh me lol