Navigation AS help

Hello everyone, it’s my first post here. Seems like a great website with lots of great advice/talent! Anyway, here goes …

I am working on a site that needs to show a portfolio/gallery. The thumbs will hopefully scroll (with easing) and scroll the corresponding main MC image. And if the user wants to put their mouse over the main MC, it will ease left to right with their mouse (thumbs to follw this as well). Hope that makes sense, I am including an image with some callouts. This is way over my head, so any help is greatly appreciated!