Although most people know a few things on In-N-Out's secret menu, not everyone knows all of what In-N-Out has to offer. It offers all sorts of stuff besides the classic burgers and fries, like specialty shakes and Animal Style burgers. Also, the steps aren't steps, they're each a menu item or custom ingredient/style.
Step 1: The Flying Dutchman
This is seriously just two pieces of meat with cheese in the middle. Or, if you want to go hardcore, you can get it animal style, where they cover it in Spread, pickles, and grilled onions.