First of all, sorry for replying late..I was out of town for a day.
I'm also interested in the DIY. But I don't want to change the lights of the odo meter..just the instrument panel. You can open the dash by first removing this inner cover.
Squeeze it a bit and pull it towards yourself.
You can see its locking mechanism here.
Remove the AC knobs by pulling them and unscrew these..
Easy right? The only difficulty is to remove the switches and clips at the back attached to the instrumental panel. I hope it is not much different in post 2002 model.