Ahhhh, Switch Crates. I recommend you read all these articles throughly.
http://www.jazz2online.com/articles/view.php?id=6 (if you want cool effects)
http://www.jazz2online.com/articles/view.php?id=32 (switch crates and similar)
http://www.jazz2online.com/articles/view.php?id=92 (general tips on episodes)