I'm trying to figure out how in the world you even got UT2k4 to run on a 16 Meg card.
I know to even get OpenGL support in win 95/98 you had to install Either GLSetup from GLsetup.com (which has since closed shop, but is still available at majorgeeks,voodoofiles), or you had to install the vendor specific drivers. Wasn't till Win 2000 i believe, that OpenGL was supported natively in the OS, even though it was a generic driver.
Not sure what to say, who manufactured the card?? You can try driverguide to see if there is a Vendor specfic driver, or maybe the Standard ATI driver for that card for linux.