JESimmons - I tried to send you a PM but it seems to have gone into a black hole as opposed to going to you, so I'll share the information here. First though, sorry about the links not working and thank you Bigramguy for posting a functional link. Doing a search on "Six-way turn signals" (leave out the quotes) will turn up the posts as well that I was trying to link to.
Evan Beck's username is Evan A. Beck. You can look him up and send him an email or PM him if you'd like.
A comment on using the wires from the front turn signals: That might work short term, but those wires are designed to handle the load of the front signal bulbs only, and not the front and rears. You would be better off following Evan's schematic and running new wire(s) to the rear for the amber turn signal bulbs. You'll need to access the wiring that comes down from the multi-function turn-signal switch in the steering column. Best way to do that is removal of the plastic shroud on the underside of the steering column as it goes into the dash.
Also, I noticed Evan's schematic didn't address the back-up/work light circuit that a few of us have. If you're going to go with an aftermarket back-up light assembly that uses something like an 1156 bulb, you can use the existing wires. If your going to use 55 watt utility lights or halogens, you will need heavier gauge wire. Evan put a relay in my circuit that senses both the factory reverse switch and a manual switch for activating the two 55 watt lights. However you do it, you will want a relay in the circuit if you're going to use something more powerful than an 1156 or equivalent bulb.
Sorry for the length of this. Hope it helps and good luck.
Jon