I only installed it because I was trying to get HD DVD playback working. I haven't actually tried my current solution using the Apple-supplied driver but I don't want to have to reinstall everything again.
I don't quite understand what you mean by "reinstall everything" again Do you mean "reinstall everything again from the ground up, including the OS"?
If so, that is simply not necessary. If the ATI driver installed at all, you will be able to uninstall it from "Control Panel->Programs & Features" (in Vista), or
"Control Panel->Add/Remove Software" (in XP). This does require a reboot.
This will leave you with a generic VGA driver under XP or Vista, so you should be able to install the Apple Boot Camp Windows driver.
To do this, it's not necessary to reinstall ALL the drivers again. Just open the Drivers Disk in Explorer (DON'T let the Installer begin), and find the installer for your card and start it. Only the ATI driver will be installed.
To find the driver installer, choose to explore disk, open the folder named "Drivers", find your card type. In my case, it is "ATI". If your Apple uses an nVidia card, open the folder named "nVidia".
The Vista driver installer will be named "nVidiaMobilesetup.exe" (if that is your card), or "nVidiaSetup.exe" (if you do not have a Mobile card".)
The XP driver installer will be named "nVidiaXPsetup.exe". You can figure out the file names for Vista, I'm sure.
Same drill for ATI cards.
This goes for ALL the necessary drivers. They may be installed individually manually, or all at once, with no input from the user.
Some devices have necessary ENABLERS. You also have to run these after the requisite driver is installed.
Simple stuff, really.
Apple has been very careful to make sure it is easy to do manually, if necessary. Thanks, Apple!
VistafanBoi