Manually tweak your own inf file instead!
I did the driver inf tweak manually for my MacBook Pro's 8600M GT. Here's how:
1. Download and extract the official Nvidia driver. You can do this either by running it (it'll go to C:\NVIDIA\...), or right-clicking and extracting to a folder (if you have WinRAR/7zip/etc).
2. In the extracted folder, open nv4_disp.inf in Notepad.
3. Under [NVIDIA.Mfg], find this:
Code:
%NVIDIA_G84.DEV_0402.1% = nv4_WSApps_NV3x, PCI\VEN_10DE&DEV_0402
%NVIDIA_G86.DEV_0421.1% = nv_G86_1, PCI\VEN_10DE&DEV_0421
4. Insert a line (which I adapted from Apple's Boot Camp 1.4 drivers) between them like so:
Code:
%NVIDIA_G84.DEV_0402.1% = nv4_WSApps_NV3x, PCI\VEN_10DE&DEV_0402
[b]%NVIDIA_G84.DEV_0407.1% = nv4_WSApps_NV3x, PCI\VEN_10DE&DEV_0407&SUBSYS_00A0106B[/b]
%NVIDIA_G86.DEV_0421.1% = nv_G86_1, PCI\VEN_10DE&DEV_0421
This tells the drivers how to find your video card and which driver to install. I told it to install the 8600 GT driver.
5. Find this in Localizable Strings:
Code:
NVIDIA_G84.DEV_0402.1 = "NVIDIA GeForce 8600 GT"
NVIDIA_G86.DEV_0421.1 = "NVIDIA GeForce 8500 GT"
6. Insert a line between them like so:
Code:
NVIDIA_G84.DEV_0402.1 = "NVIDIA GeForce 8600 GT"
[b]NVIDIA_G84.DEV_0407.1 = "NVIDIA GeForce 8600M GT"[/b]
NVIDIA_G86.DEV_0421.1 = "NVIDIA GeForce 8500 GT"
This tells the drivers what your video card is named.
7. Run setup.exe and it should now detect your card and install the driver. It may not count as WHQL certified for your hardware, so make sure your computer is set to allow unsigned drivers.
That's all there is to it!

Working perfectly for me here. Fixed a few game bugs, and allowed me to enable Triple Buffering too!