Well, I have a previous post with many steps. But after installing a fresh install of Ubuntu 8.10 I was able to skip all that and do just one simple step for Compiz Fusion. Well, maybe two steps:
Step 1. Click System > Administration > Hardware Drivers, and enable “ATI accelerated graphics driver”. Let is install [...]
This is from the Ubuntu Utah Ubuntu Forums. It took me well over a week to find this. If you follow this guide you will be able to get Compiz Fusion running perfect with a Presario V5000 laptop. These laptops have the ATI Radeon Xpress 200M series graphics card.