> does the Power Mac firmware really have x86 emulation like the
> Genesi firmware, enabling it to set up any common "PC graphic card"?

AFAIK it doesn't.

> there might be more to it than just looking at a list of GPU's you know, and it
> will indeed be necessary to use special "Apple/PPC only graphic cards", or try
> to flash/"hack" certain x86 graphic cards to turn it into an Apple/PPC one...

You are absolutely right. But it's also not sufficient to use a genuine or flashed one with Apple/PPC ROM when its GPU is not or not fully supported by MorphOS. So he would have to take both aspects into account, right.