Interactive image panning question


I am building a flash based website and have a large rectangle mc that I am panning left to right that has buttons nested inside. I followed the kirupa tutorial called “interactive image panning” and everything seems to be working fine. My problem is this. I want this panned mc to be centered and framed by a black border that will also act as a mask hiding the ends of the rectangle that have not yet been panned to. When I add this black border the code thinks the stage dimensions are larger and the panning gets whacky. How can I contain this panned mc so it doesn’t react to a change in the stage dimensions. it also does this when I open the published HTML in the browser. I basically want it to behave like the sample image on the first page of the “interactive image panning tutorial”. There must be an easy solution. Any help would be greatly appreciated.