Want to learn how to "Boot from VHD" with the new operating systems we have coming?  How about "Dual Boot" with Windows 7 and Windows Server 2008 R2 ???
It's simpler than you think.  Checkout this video and see the full background and details at http://blogs.technet.com/keithcombs/archive/2009/05/22/dual-boot-from-vhd-using-windows-7-and-windows-server-2008-r2.aspx.

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