Help! Flash Image Panning

I am currently developing a pixel and I would like the user to be able to pan around the city.

I think the easiest way of doing this is to have a very large image (3500px by 3000px) and four buttons, one at the top, bottom, left and right. I would love it that when the user hovers over the button the screen/stage will move in the direction of the button. for example when the user hovers over the left button flash will move the image to the right so the screen will move left.

Please help I have made most of the pixel designs, I just don’t know how to do this, could someone point me in the way of a tutorial or something.

Thank You

Big J