Controlled panning of image?

This is driving me crazy, probably since I’m new in flash…

Problem: I want to create a controlled panning of an image, horisontal movement of a oversized image, with for example left and right buttons that move the image in defined sections. I’ve seen it on the web and it’s probably super easy, but for a novice…

Grateful for any links or whatever that can enlighten me!

/Jiro