Thanks for your helpHello Kieran,
One of the tutorials below may be able to allow you to do what you want.
http://www.sevenforums.com/tutorials/625-boot-vhd-using-windows-7-a.html
http://www.sevenforums.com/tutorials/2953-virtual-hard-drive-vhd-file-create-start-boot.html
Hope this helps,
Shawn