I had the same problem (sorry for my English). Ive installed all the updates for XP, then i updated my drivers to top, but it doesn't work. BUT! I was installing drivers without ATI panel, only the driver. The last version of drivers on time of writing the post is 27/01/10 (catalyst 10.1 or something, dont remember)- installing this helped the video to run for an hour, copmparing to 4 minutes before using this drivers. After being stopped again(DAMN), i ve decided to slow down the clocking of card in ATI panel- originally it was 650-400 MHz, then ive made it 400-400 and black screen of death dissapeared for ages. I had very much troubles with this, so i hope it would help somebody. Dont feel any differience in games.
the only thing for thinking is the count of triubles with this card- like ATI_AMD cant create a stable hardware.