These resources can be great.I would be careful. A few of them have novice concepts and/or old ways of thinking that have proven incorrect.
One magazine listed above has an engineer that recommends keeping all speaker runs exactly the same length, and coiling up the unused length. This is supposed to keep the speakers in time, maintain damping and impedence. Whatever.
Use at your own risk. I would say hire some professionals from a local union, or production house to come in and do the service, and train people while on-the-job.
Maybe this is a nice new job for guys "in the know". We could start a sound missionary program.