http://2chnull.info/r/software/1320696914/1-1001
Many people tested to across the guest VirtualBox image to another host computers.
The guest Windows XP can be run smoothly.
But the Windows Media Player can't!!! You have to deleted all of the files in the DRM folder and updated to 11.0.6001.8015 IndivBox.key.
It seems you must have the same (or similar? ) CPU (not sure about the motherboard?) as the original host machine.
The IndivBox.key checks the envirorment of your OS!!!