Yet Another Simple Image Pan Question

Hello Everyone,
Is there a way to have the image pan (http://www.kirupa.com/developer/flash8/interactive_image_pan.htm) not be based on the Stage.width but rather the width of the image itself?

My stage size is much larger than the image in the pan, but I still want the right and left most part of the stage to be relevant to left and right most extent of the image.

Image size: 801px;
Stage size: 2000px;

Thank you much in advance,
Cheers!