having done the papagayo to LOR cut and paste thing for a couple of years now, the xlights way is much easier. For Hallelujah I ended up with 4 timing tracks. #1 was a generic timing track that I use to Fade-up and fade-down and do the Humming parts. #2 was main lyrics, #3 was background Lyrics, and I called #4 the beat-box track. Switching the faces was simple as each face was pointed at the appropriate lyric track, example there is one place where my "girl" tree is singing backup then switches to singing lead on the primary lyric track. Simply telling the face which lyric track they are suppose to respond to made it work. I'v very please with xlights and I believe this is the tightest synchronization I've been able to achieve using either papagayo or xlights.