Hi Joe, I use Bandit crankbaits and I replace one of the factory hooks with a red #6 treble hook on either the front or back hook. I've heard that they say to do it on the front and others say to do the back. I just did some of each but right now my trolling experience is too limited to comment on which way is better.
Maybe some of the trollers on this website can give a little more info on changing hooks out.