Quartz Extreme is, of course, not supported on the Rage PRO, and the system steadfastly refused to use the card at all in the presence of Quartz Extreme capable hardware. Even the "enable Quarz Extreme" hacks floating around were of no use, but this didn't stop me from beating on the system until I got it to work. I have chronicled my exploits for those who might be interested how I solved the problem.
If you're having problems with secondary displays in 10.2, this tip might be just the thing to bring your PCI video card back from the "dead" of unsupported software.

