Just run the card with the 4.2 cat drivers. I run 4.2 on my 9500np and it works like a charm. Don't bother with the newer drivers.
Besides, ATi recommends you "DO NOT" install newer drivers if your current ones are running
fine.
NEWER ISNT ALWAYS BETTER!!!!!! The radeon 9500np itself proved this and thats why it was discontinued by ATi. (check out
www.overclockers.ru to see how it wooped 9700pro's butt!)
Oh, and by the way, I too have done the 9700mod and i strongly encourage you to do it too.