Download the latest driver at Rage3d.com. In W2k if I enable HierarchicalZ my Radeon will crash on the second game everytime. With the 7089 drivers in WinMe it runs fine except for some artifacting in the Max Payne demo/test. Are you tweaking the registry or do you have the drivers in default? I found the default drivers as intended by ATI to be the fastest setup for 3dmark2001.