First, those fuses are like 2 for 5 bucks at the dealer. (i have blown my fair share of those little red bastards) So its really not a big deal if you blow that particular one.
2nd, I dont know why everyone is trying to wire these thru the actual dome light itself. That is a way harder process....
Look up the DIY link for the Lighted Door sill wiring....it is the exact same thing. If you follow that, you dont have to worry about overhead lining and running a rediculous amount of wires and it achieves the same success.
Psyth: Yes, that is why your fuse blew, your wires touched together. I have done it before too so dont feel retarded. When messing with those wires or any wires for that matter, never let the two wires touch. You will blow a fuse everytime.