New to Windows 7, is the ability to leverage an existing VHD file and boot to the environment contained in it natively. This post walks you through booting Vista. Note: Replace with your drive, path, and filename.

First, you’ll need to add an entry for the Windows Vista option to boot from VHD. To do this, I’ll copy my current environment entry and then edit the copied entry with the appropriate parameters. To do this, type: Bcdedit /copy {current} /d “Windows Vista” Now, let’s edit the newly added boot device with the correct values. In my case the correct path to the VHD file must be supplied and associated to the correct CLSID. To do this, type: Bcdedit /set {CLSID_number} osdevice vhd=[v:]“\Hyper-V\Virtual Hard Disks\WS03 VMAdd.vhd” You are done! To get a sample of what the boot menu will look like before you reboot, from the Run menu, launch msconfig.

Source:→ TechRepublic