Don't stress about it too much. That is used in case you are going for a job that needs a security clearance. If you aren't really going into military inteligence or anythign like that, I wouldn't stress too much about it.
There is a key phrase when you are putting your signature down. You are signing that all of the information you provided is "to the best of your knowledge". You can put down some of your friends names, and just come up with some address to put down. It really isn't going to matter too much because not everyone keeps address tabs on thier friends. If they are really needing to find out where your references are, they will find a way to get a hold of them.
But really, don't worry about it all that much. Go ahead and put people's names on there and if you need to use an address, just use a bogus one. They aren't really going to pick up that you were making it up.
Good luck