Yeah you can load up cat 3.0 on the 8886
First extract the installation files (after that, do no try to use the included ati setup), then remove your current driver and software using the add/remove software propmt and the device manager.
Windows will load with its crappy standard drivers, go to the device manager, search for the display driver, click update driver (Or install), in the prompt when asked, click select location of the driver, go to the installation folder, then drivers, select the directory, then many devices will be listed, select the radeon 9000 pro, ok ok to all prompts, maybe it will ask you to reboot, but before rebooting, go to the install folder, look for software, ati panel, install the panel, reboot.
Right on! The ati cat3 drivers are ready.
(It runs very stable with them, and a bit faster, if anyone wants benchmarks, tell me)