Flash navigation problems.. please help!

I am attempting to develop a website that functions like www.4thavenuejones.com. Another example of the same functionality of this style can be found at [URL=“http://www.leroythehand.com/”]www.leroythehand.com. These sites are just awesome! The Navigation is determined by scrolling in a certain direction with the mouse.

I am pretty sure this is common, and many tutorials or FLA files are out there, but I haven’t found any yet. I would love any direction or lead to get a tutorial on this concept. A link to download a sample source file would be ideal!! I have exhausted my efforts in trying to find something in this forum and even across the web, but I am limited in the “name” of this functionality so searching for it has been almost impossible for me.

I would appreciate any help on this guys. Thanks