I'm a nice guy, and I would help, but the less millennium falcon xbox's there are, the more limited edition mine will be when I sell it on ebay, so the better profit I get.
I will give you this info though, it's not just like a usual mod, you'll need a hell of a lot more than a soldering iron and wire to fit the xbox inside. It's gonna take at least 100 hours and a hell of a lot of thinking and planning before you even start it. Good luck though.