Following the HP link --> HP Pavilion zd8000 CTO Notebook PC --> Software & Driver downloads --> Microsoft Windows XP
All they have is the ATI M22/M24
BRB, going to restart in Safe Mode.
Update:
Okay, Safe Mode is fine, no weird checkerboxes. I have a feeling that this might occur tomorrow, I guess I'll have to wait and see when it messes up again.
Re-Update:
Alright, I decided to turn off the computer for a bit, thinking it was just a fluke, and I was RIGHT! The problem is back and it seems to persist in a different way now. This time I was unable to start the computer regularly. I can hear the Windows chime, but there's no video. The screen is just black. When I force it to suspend itself, I can see it flicker, but other than that, nothing.
So, back to Safe Mode.
Here are some screenshots of the problem (sorry for the large size).








