Hi dframeli, and welcome to EAB!
I also have an Amithlon/Amiga OSXL and QNX installation CD set.
I have been able to get the Amiga CD to boot to Amithlon on a Pentium III 1GHz PC. Also I have installed QNX followed by Amiga OSXL in the same machine.
It was a long time ago. In fact, it must have been shortly after Amiga OSXL was released, because I actually bought the PIII in order to run it!
I'll try to come up with some instructions for what I did, but it may take a while. All I can say for sure right now is that you don't need any knowledge of Linux to do what I did.