VHD Attach enables right-click mounting and dismounting of VHD files in Windows 7
But VHDs aren't as easy to work with out-of-the-box as they could be. To mount and unmount, you've got to head over to the Disk Management snap-in (diskmgmt.msc), wait for the screen to populate, go to actions->attach (or detach), browse for your VHD, and then wait some more.
VhdAttach speeds the process up by adding two entries to your context menu. Mouse over a .VHD file, right-click it, and you can mount and dismount right from Windows Explorer. Left click attach, and your VHD will pop up alongside your physical hard disks. When you're all done, detaching is just as simple.
The control app (inset in screenshot) which can open your VHDs and display information about them. You can also attach and detach from this screen.
VhdAttach is a free download and works with both Windows 7 and Server 2008.