The basic idea is to make the crate the most rewarding place ever. Susan shows you how to make it so reinforcing that often it's hard to get them out of it! I experienced that with Kara. She caught on to the game very quickly and learned that staying in was better than coming out!
Here's a short video of her going in from a short distance on a quick cue. We'd done a lot of the foundation work and I thought I'd try and see what would happen if I sent her in and called her out from a distance.
The skills learned in these games are very useful in a lot of situations. First of all they become comfortable in their crate when you go places like shows and the skills can be transferred to things like waiting at doors.
If you'd like to get the DVD for yourself, I highly recommend it. It's available at Clean Run.