Be careful! ShapeShifter doesn't seem to be 4Gig+ friendly. My Mac partition was above the 4Gig barrier and the emulation overwrote my DH1 and DH2 partitions. Twice (I wanted to make sure it wasn't a random fluke). Thankfully I had backups, but it was a serious pain to restore them.
I've given up on Mac emulation until I get a separate dummy drive to use.