From what I know the switches are a one piece bank and you can't cut it up or the switch bank doesn't work. So you can't put another switch in there. I haven't verified this so you may want to wait for someone that has done a different switch to chime in.
Interesting note, while running through my manuals today I discovered that one option on the JK is to have electrically adjustable head lamps. And the cover plate that indicates AIR BAG stuff is the switch that controls the 3 positions of the electrically aimed head lamps. So does that mean that the switch bank can be modified or is there a whole other switch bank part for the electrically controlled head lamp aiming.