I know that C2 is written for MP, but I believe only within one machine. I have a dual 1G G4 (LOVE IT!) and I dual boot for OSX and OS 9.2.1, and both work great with C2. (9.2.1 worked fine for C1 as well) C2 works so much faster now, but of course now they have GI, which is a MAJOR render hog! (GI used with animations is going to have to wait for a while I think!) Willf- does your friends cluster technique work for any program? I should would love to render-farm from within C2! (I wish they implimented THAT in the new upgrade!)