« on: April 29, 2013, 04:22:59 PM »
When my wife and I got married a few years ago, we too were on a very restricted budget, however, we had a friend with a 40D and 70-200 2.8 ii. We also "hired" my wife's cousin who had a point and shoot. To be brief, I know what your friend is facing, and I doubt that they have any super high expectations. I would proceed with caution since you are fairly limited on your gear, but if they are truly on a "cut-all-corners" type of budget then I think it is nice of you to help them out with some pictures.
My wife and I do wedding photography professionally now, in the Tulsa area, and have learned just how wonderful professional gear can be. We also rent for the events that we are doing such as the 50 1.2 and 24-70 ii we are renting for a wedding this Thursday. If you just want to rent something, then it can be fun, but this is a huge task at hand.
For settings, I would tend toward expanding your iso to a max of 3200 and opening your lens to 2.8, work with the center focal point while shooting in Av, and just have a good time. I know that a lot of folks here are going to agree or disagree with my advice, but I've been on both sides of this situation and think that you're doing a great thing if you are up to it.
Good luck and God bless,