diskpart
create vdisk file=c:\vhd\test.vhd maximum=25000 type=expandable
sel vdisk file c:\vhd\test.vhd
attach vdisk
list disk
sel disk 1
create part primary
sel part 1
active
format fs=ntfs quick
assign
exit
imagex /info c:\vhd\install.wim
imagex /apply c:\vhd\install.wim /check 4 g:\

diskpart
sel vdisk file=c:\vhd\test.vhd
detach vdisk
exit

bcdedit
bcdedit /copy {current} /d "Boot VHD"
bcdedit /set {id} device vhd=[c:]\vhd\vhd.vhd
bcdedit /set {id} osdevice vhd=[c:]\vhd\vhd.vhd
bcdedit /set {id} detecthal on
bcdedit /set {id} description "vhd boot"