Double clicking on a VHD to mount it
Virtual Server 2005 R2 SP1 Beta 2 includes 'vhdmount' - a tool to allow you to mount a virtual hard disk directly on your host operating system. While vhdmount is provided as a command line tool - a very small amount of work will allow you to mount VHDs by just double clicking on them. By creating a .reg file with the following contents:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Virtual.Machine.HD]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Virtual.Machine.HD\shell]
@="Mount"
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Virtual.Machine.HD\shell\Dismount]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Virtual.Machine.HD\shell\Dismount\command]
@="\"C:\\Program Files\\Microsoft Virtual Server\\Vhdmount\\vhdmount.exe\" /u \"%1\""
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Virtual.Machine.HD\shell\Mount]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Virtual.Machine.HD\shell\Mount\command]
@="\"C:\\Program Files\\Microsoft Virtual Server\\Vhdmount\\vhdmount.exe\" /p \"%1\""
[HKEY_CLASSES_ROOT\.vhd]
@="Virtual.Machine.HD"
And then double clicking on the .reg file (to load it into your registry) you will be able to double click a VHD to mount it, and right click on it to dismount it.
Source:
http://blogs.msdn.com/virtual_pc_guy/archive/2006/09/01/734435.aspx