O.K so i came up with an awesome idea. i want to rearange a few keys to it makes more sense. on my macbook i want to move f1 through f12. heres the new layout. f7- volume down f8- track back f9- playpause f10-track forward f11- volume up f12-mute also move all f1 through f4 up a key and move the eject key to the right of the esc key. how can i reprogram my computer to do this.