i have had nasty issues with older drivers messing up the newer ones, and just making the whole setup not work. I installed a free program called driver cleaner http://www.drivercleaner.net
and it erased all traces of the old drivers
everywhere in the machine. After that, it was rather easy to install the newest driver, and it worked.
If you have the choice, stick with the rage 128 card. The rage IIc is way to old, and has useless 3d.