This may or may not help you, but there is a problem on some hardware combinations where the 3d drivers can lock up. The correction is to go into regedit, click your way into:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management]
Edit or add the DWord value: LargePageMinimum and set it to FFFFFFFF (Hex).
This apparently resolves a memory management issue in win2000 and XP.