I do have a 9600 and it works fine even under win7. At least as far as functionality goes, but no further. I used to use these drivers with a 9800 as well.
Problem is, even if they work, Vista drivers for the 9xxx series are terrible. Just terrible. Especially OpenGL drivers. I repeat, even if they do work. They're not optimized in any way at all.
I suggest you either get a newer config, or just downgrade to XP. The latter one is much cheaper, and you can expect at least 80% performance improvement in almost every situation. You see, Vista and later hate single core CPUs. They hate Athlon XPs even more because of the lack of SSE2 instructions. Video drivers are a complete garbage. Do yoursef a favor and install XP.
CPU: AMD Phenom II X4 810 @ 3250MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 850/1100MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 7 Pro x64
CPU: Pentium 4 Northwood S478 @ 3200MHz | RAM: 1,5GB DDR 400| MoBo: Gigabyte GA-8S661FXMP-RZ | GPU: ASUS Radeon X1650 Pro 256MB | Display: Dimarson 19" CRT | PSU: Noname 400W | OS: MS Windows XP Pro