here is the user guide to the radeon 9000
this is just a brief quote, you might want to read it in more detail:
http://www.ati.com/support/manualpdf/AW9000Pr.pdf
Do This First!
To ensure a successful installation of your ALL-IN-WONDER,
you MUST do the following BEFORE replacing your current
graphics card.
Uninstalling Old Graphics Card Software
To ensure successful installation of your ALL-IN-WONDER
card, you must uninstall the graphic drivers for the existing
graphics card before removing it from your computer.
To uninstall old graphics drivers
With your current graphics card still in your computer:
1 Close all applications that are currently running.
2 Click Start, Settings, Control Panel and select
Add/Remove Programs.
3 Select your current graphic drivers and click
Add/Remove…
4 *The Wizard will help you remove your current display
drivers.
5 The System should be restarted after the drivers have been
removed.
*If the previously installed graphics card has any additional
software installed, they may also need to be removed at this
point. (For example DVD Player, Multimedia applications, etc.)