Keep it simple...change the regulators and remove and replace the entire harness. If you are missing any wires where you plug the harness in, run new ones to the proper fuse/breaker recepticle. Replacing the doors is just extra work. You are going to have to remove the interior panel to install the wiring no matter what. How hard is it to drill out some rivets, and pop some ball studs, vs removing a door, rehanging and realigning it? Do it 4 times, and you are done. The regulators can easily be done by one person, and you will probably need two to R&R the doors.