I don't believe there would be any way you could both dual boot and virtualize the same installation of any OS. The virtual OS uses a compacted hard disk that is called a .VHD (virtual hard disk) file. But a year or so ago I used the free VMware Player to play around with several different versions of Linux. If you have sufficient RAM and hard drive space, using a virtual OS is MUCH handier than dual booting, since you can have both OSes running simultaneously and changing between them is just a mouse click or two away...