He mentioned in another thread that he’ll be adding this to the theme by default in a future update. Here is one of the links that I found from the forum – http://bit.ly/Ob2bQ7 That’s what I used.
Make sure you remember to add the javascript code in your functions file, as well as the javascript file inside of the “lib” folder. If you leave one of those steps out then it won’t work. So make sure you have the javascript added.