Sounds like you just need to experiment with the different cheat codes. I would start trying different combinations of knoppix26 nodma noscsi acpi=off, but you might need others and I don't know of any good way to find what any systems needs except experimentation. I would also suggest trying an older rev of knoppix, like 3.1, if you can find it (to see if the less agressive stratup there works better, although you would then likely still want to get a newer version working). Unfortunately, I don't know where you might find an archive of the old iso images; I had to delete my old copies (needed the space). Does anyone have any insight on where the old iso files might still be found?

Or do you know of a particular problem that you have that goes beyond the cheat codes?