Wow, glad I came home tonight! I've been out since prety early, and wasn't planning on coming back for most of the weekend.
Anyways, on the four conductors...
Red-hot
Black/Bare = Ground.
Green and white are the series link. Leave 'em unless you're splitting.
Red/Green control the slug coil (south)
red = start green = finish
Black/ White control the screw coil (north)
Black = start white =finish
Using the above start/finish stuff, you can find a whole lot of schematics at
Guitar Parts & Wiring Diagrams-FREE Shipping Over $49 that will be easy to follow.
On the soldering to the pot stuff, you want sa good, HOT iron. 25 or 35 watts is too low, IMO. A HOT iron will get on and off the pot faster. The faster the better... sitting on the pot, taking too long to heat it up, is what causes them to burn up.