It is not legal to install Mac OS X as a VM on anything that is not produced by Apple. Check out the license restrictions.
Edward L. Haletky
VMware Communities User Moderator, VMware vExpert 2009
Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.
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I know there are Vmware images out there, with OS X.
I have seen one running in a workstation once, but as the others said, its not legal.
But it is posible, and that was your question right ?