Hello everyone I am a photographer for my high school yearbook and I have been given the task of taking our graduating class (300-350 people!!) group photo this year. Last year they hired a pro to do it but they're being cheap this time. I have a Rebel XTi and I know how to use it fairly well, but I have no real experience with big pictures of this type (especially indoors). Here's one of the shots taken by the pro from last year: http://img211.imageshack.us/img211/8937/dsc0027copygv8.jpg As you can see, the space I have to work with is a double-size gym. The difference is, last year that photo made up a 2 page spread in the book on 9x12" pages (e.g. 18x12" image). This year, the book itself is landscape - so I need to have everyone spread out even more because in the book it will end up being a 9x24" image. Half the height, twice the width. Last year it was b/w in the book but this year it's going to be in a colour section, so it's going to be even trickier to get right. The setup I'm imagining has my camera attached to the top of a 8' or 10' ladder (both are available, I'll see which is best) with a Gorillapod. I have a remote shutter cable so I can get someone else to push the button, becasue I have to be in it. I'm going to rent a EF-S 10-22mm so that I can get everyone in. I'll set up a laptop with EOS utility so I can see the photos and make ajustments without climbing up and down the ladder. I'm planning on using the pull-out benches that you can see at the sides of the above shot to arrange everyone on, with an extra row of regular single benches if needed. However, my main question is regarding lighting. The light in the gym is horrible. It's darkish and off-colour. (I shoot a lot of sports for the school and this gym is used for basketball a lot.) I'm planning on renting 2 or 3 (?) Elinchrom 600RX heads with 12.5' stands. The thing is, I have absolutely no experience with lights of this type. I've never even touched one before. Should I use umbrellas? I also own a Speedlite 580ex ii, will it be any use at all? I know this is a lot of information to process, but any and all advice is appreciated. Thanks!