ATI Cards and Knoppix 5.3.1

[knoppix2008]

Hi,
My Ati-9550 works ok and fast with Compiz-Fussion using the ati xorg-free driver. I don't use the fglrx now also free drivers.

Can you please tell me where can I obtain this driver but even more importantly to me is how do I go about installing this driver into Knoppix? Thank you.