i don't have any technical background to be able to advise you on this... but i gotta ask: even if you could switch them, you'd still have 1 black keyboard and 1 white keyboard... whats the advantage?
Yes you can do this, there are many pics out there and on this forum of people who have done this. Like SteveMiller said though, you will still have one white and one black keyboard, and your MBP/Air/MB whatever you have, will not be able to use the backlight through the keys, with the white keys on it. Just to let you know.