Managed to get Red Hat 6.0 installed on my laptop no problems (IBM 365XD), however getting X up was just not happening. On a whim I installed Caldera OpenLinux 2.2, presto, card detected and set up properly (course X runs like a dog on a P120/24 megs of RAM). Anyways, food for thought. https://www.seifried.org/365XD/
This should be fixed in the next Xconfigurator release (4.2.6), which will be in the next Raw Hide release.