When you have open, post details of what you have, ie. brake or gear. Is the rear wire also routed through the chainstay? and if so how is it routed through the BB.

Also before you start, bring an inner wire (brake or gear or both) to the hardware store or Radio Shack, and buy a length of electrical "spaghetti" (thin tubing). You want the thinnest that the wire fits through, either free sliding, or so you can push it up a ways and have it stick.

It'll come in handy to thread the wire.