Native Boot VHD Differencing Disk: HowTo?

[ih82bl84f1]

Good Very Hello!

I am very happy and delighted as I have managed to be able to follow directions enough to try native booting a VHD in Windows 7. I created a blank 20 GB vhd in "Computer Management" under "Disk Management" initializing and formating it. Booting off the Windows 7 DVD, I then installed Windows 7 right to it from reading off the internet how to do it. Booted up fine and I am smiling cause I think it it sooo cool! yayyyy! hehe

But alas ... I have reached a point where I am totally confuzzled! I would like at this point to be able to create a "Differencing" disk so I can retain the "Virgin" install but am lost how to go about it.

If anyone can give me a walk through what to do from here I would appreciate it. I have read quite a bit from "Googling" but am stumpified terribly so. I do not know how to make a differencing disk to attach so when I am at my boot menu selecting OS to start, it won't write to my "Virgin" install vhd.

This is the info I got from Bcdedit:


Windows Boot Manager
--------------------
identifier {bootmgr}
device partition=C:
description Windows Boot Manager
locale en-US
inherit {globalsettings}
default {current}
resumeobject {2ee778fa-d465-11de-af46-f21ac19cf4bc}
displayorder {current}
{2ee778fb-d465-11de-af46-f21ac19cf4bc}
toolsdisplayorder {memdiag}
timeout 3

Windows Boot Loader
-------------------
identifier {current}
device partition=C:
path \Windows\system32\winload.exe
description Windows 7
locale en-US
inherit {bootloadersettings}
recoverysequence {2ee778f7-d465-11de-af46-f21ac19cf4bc}
recoveryenabled Yes
testsigning Yes
osdevice partition=C:
systemroot \Windows
resumeobject {2ee778f5-d465-11de-af46-f21ac19cf4bc}
nx OptIn

Windows Boot Loader
-------------------
identifier {2ee778fb-d465-11de-af46-f21ac19cf4bc}
device vhd=[D:]\Win7VHD\Win7VHD.vhd
path \Windows\system32\winload.exe
description Win7VHD
locale en-US
inherit {bootloadersettings}
recoverysequence {2ee778fc-d465-11de-af46-f21ac19cf4bc}
recoveryenabled Yes
osdevice vhd=[D:]\Win7VHD\Win7VHD.vhd
systemroot \Windows
resumeobject {2ee778fa-d465-11de-af46-f21ac19cf4bc}
nx OptIn


At this point, how would I create a "Differencing" disk and boot to that? Any expert help would only be greatly appreciated!