You're ****ed.
Darwine - Doesn't emulate a x86 platform.
Crossover - Doesn't work on non-Intel
Boot Camp - As it's booting the OS natively, Intel processor is a must (Not AMD as AMD sucks)
Virtual PC - Theoretically would work, but there's no Graphical Adapter support
VMWare/Parallels - Requires Intel Processor.
That should about cover it, but you're out of luck on a PowerPC processor.