Actually I have gotten Suse 9.1 to work on MS VPC. Quite frankly it does not work very well under the OS X system, but if you have 9.2.2 Suse does work.
I have not figured out why, but under Mac OS 9.2.2, Suse works very well, the performance is nothing to brag about, but it better than it is under OS X. The movements are more fluid, programs open faster, it is not that bad.
I don't know if this is what you wanted to hear, but this is my experience and I have a Dual 1.25GHz G4 with 1 Gig of RAM.