Picture Navigation

I’m trying to find a tutorial on how to create a specific navigator effect. I’m sure you’ve all seen it. I’m just having some trouble with the scripting. What I want to happen is I have a map and you can only see a small section of it, when you click on a button the map slides behind the window to the new point. I’ve mainly seen this done in photogalleries where all the images are layed out on a grid inside a MC behind a mask then the MC slides around to show the selected image. If anyone knows what Im talking about and could help me I would greatly apreciate it. Thanks