sounds like the salesman suckered you in with a nice pitch. windows nt, 2k, xp, 2003, and linux can run multiple os's as well (its called vmware), however i dont think theres a program out that emulates a mac architecture (but why would you want to do this?). and no, i dont think youll be able to play your games on the virtual os. your virtual machine will use a virtual graphics card so whatever radeon or whatever graphics card you have in your mac doesnt apply to your virtual machine, or at least thats how vmware works.