Possible Duplicate:
Installing Tiger on a Snow Leopard MacBook
I would like to be able to run OS X 10.3 for the purposes of software testing on a modern (x86) Mac. I'm aware of emulators such as SheepShaver which do this kind of thing for "Classic" Mac OS (up to System 9.0.4), but I can't seem to find anything which would allow me to run a VM for older versions of OS X ?