How would you go around swapping a 3DS' motherboard into another?
Unfortunately, the 3DS system transfer coming out will not be able to transfer everything and I recently received a new 3DS as a present (due to the person knowing I'd prefer the newer color). I'd really like to keep all my data so I've been looking for information on putting the motherboard (As while some data is on the SD Card and some data remains in the game cartridges, there is still a handful on the system itself) into the new system I received and was curious about the best way to do that.
However, because this wasn't complicated enough, I decorated the top part of my original and would rather keep that so I'm only interested in changing the bottom/face of my original 3DS to the newer one (and obviously, the original motherboard into the other system's bottom/face).
In short: I'd like to attach my original 3DS' top to my new 3DS' bottom and swap the motherboard from my original 3DS to the new 3DS' bottom. What would be the simplest/best way to go around doing this? (Example: I have a black 3DS I got on release day. I decorate the black's top with some red decals. My father buys me a red 3DS as I prefer red to black. I really like what I did with the top though so I only want to just change the bottom of the 3DS (The face where the buttons are and the back where the text and logo are) to the new red and place the memory from my original black into the new red base. Example picture: http://i42.tinypic.com/2zhh5lg.jpg )
And just in case it's needed, my old bottom will need to be reattached to the new top as, to my surprise, a family member really wants it (They already know what I'm going to do to it), so I do need to make sure both can go together and work just fine.