Booting Xp VHD on XPM, not possible?

Ok so i have created a VHD of my system (dual boot of xp and W7) using Disk2vhd. It's now sitting on my USB HDD which i am able to create a new VM in XPM using that as a HDD. Turned on the VM and everything looks fantastic. Selected windows 7 boot and it booted fine. But when i go to boot Xp it just load and then goes black.

I think this is a restrictions on XPM not allowing to boot to a Xp VHD, Y/N?

it's not a restriction from XPM, it's just your XP HDD needs to be tweaked in order to boot inside a vm.

You can read more on this thread:

http://www.sevenforums.com/virtualization/28427-make-your-live-system-into-vhd.html

I've replied to that post, however i'm not sure if it referes to dual boot or not. If it's something wrong with the VHD, then why did w7 part works and not xp?