LOTTA folks use the tweaked-ATI drivers from Omegacorner.com. I've used nearly every version of these since I got my 8887. The last 6-10 versions install right over your existing drivers. I'm on the version 4.5s now. The Omega drivers are usually as good (or as bad) at the ATI version they are based on. (Now why does ATI come out with new versions all the time? "Enhancements?")
There are some that swear by some of the 3.? Cats. Some go by Omega. The Omegas cause my system to run a lot slower than it's supposed too. IMO 4.6 is best for whatever application I put it too. I don't have your specific laptop to know incompatibility issues but the 4.6 Cats seem very stable and quite fast.