As I have not done wedding or similar I am not able to contribute much.
I have done a web trawl and post a link to info on the Canon flash system so there is something for me to refer to. 3 pages long.
http://photonotes.org/articles/eos-flash/index.html
Also a few tips for the amateur, 2 pages long
http://www.all-things-photography.co...aphy-tips.html
Don