Hey again

I'm trying to fix a friend's laptop. I reinstalled windows. His laptop didn't come with any CDs. Lucky, his girlfriend has a similar model laptop. I have managed to install all drivers accept for the one for the graphics.
I downloaded a driver called
"81.85_forceware_winxp2k_international_whql". When I run it, it looks like it's getting somewhere, but then an error pops up... It says "The NVIDIA Setup program could not locate any drivers that are compatible with your current hardware. Setup will now exit." Can anybody point me in the right direction please?
The laptop specs are as follows:

AMD Turion 64 X2 TL-50 1.61GHz
896MB RAM
nVIDIA GeForceGo 6100
M/B Version A6M
XP Pro SP2

Thanks