Soren,
I just tried your guidance, which is what we've all been trying all day (clearing drivers, reinstalling, when that failed trying older drivers). I went through and even ran DriverCleaner to clear out every single ATI related file and then reinstalled the 5.10 drivers after your post.
Unfortunately it still isn't working. I've uninstalled, cleared all files from the entire hard drive, went out and got the newest drivers possible, installed, did all the needed restarts between each step... I still get the same error.
I have the latest DirectX version, and even tried reinstalling from the DXSetup file that came with the game CD. Still nothing doing.
I appreciate you guys working on this, but you'll have to forgive my impatience... I really want to play this game!
-Z