A really good book that Scott_F turned me onto is the "Guitar Player Repair Guide" by Dan Erlweine. Covers pretty much anything you need to do to your guitar. I picked it up after being quoted the price of $60 per pickup for installation. It was well worth the $15 for the book and the additional $10 for a soldering iron. Next up I'm going to try to refret an old acoustic I have laying around.
Keep us posted about the cavity routing. I'm interested to hear about the process.