virtualbox.org

I want to make my VDI into an image i can push onto another partition so I can cold boot to it.

You can use imaging software like Acronis True Image to create an image and store it on a network share. Then you can restor that image on a physical drive.

There are also some other tools perhaps. Please use the search, either the one available on the forum, or google with a site filter (like this: vdi install to hard disk site:forums.virtualbox.org).

I've booted a live CD image(.iso) containing ghost in the VM and then ghosted installations from within the VM. Works like a charm. I eventually got lazy and now I just .rar the .vdi file when I install a new machine.