Hi I have a zd 8060 us with a 128 ati card too. my problems were on extreme slowdown on graphic. after downloading a new video driver, new catalyst 5.7.....still had problems....then found this topic in here further down:
http://forums.obsidianent.com/index.php?showtopic=35236
read it throughly and it solved my problems totally.
thanks for whom ever wrote that in because i'm sure alot of people are having the same problem.