Onan the Clumsy,
If you have a Notebook with a Radeon on it, then your only option is to go to the actual Notebook maker's website in order to get the latest Drivers. ATI, does not publish any Drivers for the public to download on their Radeon Mobility Chipsets.
It would be worth checking the website of your Notebook maker in order to get the latest Drivers.
Take Care,
Richard