OK...I actually think I already have one of those Turnigy BEC's, looks like I gotta do some digging. the wiring seems pretty simple, although I've now read about 20 different forums on how to do it and there's a lot of different opinions on the "right way".
From what I understand:
1. Wire pos/neg to battery lead.
2. Cut power wire from esc
3. Plug BEC into receiver
4. Figure out what to do with 5' of extra wire
5. Drive truck, kiss cogging goodbye!
(6. Plasti dip the crap out of it)
right?