I've not been paying too much attention recently, and I've just seen your post.
Did you get an answer from elsewhere?
If not.....do your cameras have their own soundtrack? If so, you can bring them into Premier, expand the soundwave, and match it that way, if you can't do it the timecode way. Look for the same soundwave 'shape', and line it up exactly. It's possible to get frame accurate, I've done it.
Then bring in the master soundtrack from the PA and do the same thing. Once you have the soundwaves lined up, the video must be as well. Then you can mute the sound from the cameras and just keep the PA sound. I have made a vid of live bands, from 2 cameras, using the sound from just one camera, that way.
If you overlay the video tracks, then cut 'windows' in them at appropriate places, you will cut from one camera to the other, while keeping the same sound throughout.
Win XP, Athlon 1.8, G force 3 T, 1 60gig drive + 1 250 gig, Pinnacle Studio 9 plus mostly, Premiere 6, and Vegas 5 sometimes, Soundforge, Cool Edit.