Multi-painter contract?

I have recently found 2 events, one with 25,000 people and the other with over 100,000 people. both of them are in July and I am going to be the only painter. I have contacted a few painters in the area to see if they want to join in on the fun but all parties to be clear of what is expected of them and so on. DO any of you have a contract for things like this. I would like to see a few different examples to get an idea of what to write. As if its not bad enough just learning how to paint and run my own business now I have to be the legal dept. too lol

DOes any one have something like this? IF not what do you use when you have another painter join you? please help