The main issue here is that you must install the upper case that has the functionality you are wanting (Expose, etc). The newer upper case is not only backward compatible with your older MacBook, but the new key functionality is gained by upgrading the case. Very cool. After installation, its a free-for-all. Swap keys all you want and the function behind the key is not going to change. I personally have alternating black and white horizontal rows on my MacBook keyboard, although I do not have the fancy upgraded keyboard with the dashboard and expose key functions. Have fun!