Resizing images into slideshow FLA

I am elated to have finally gotten a slide show with thumbnails but am trying to hack into the files so I can load a larger image than the ones plugged in to the file. The tutorial that I am referring to is this: http://www.kirupa.com/developer/mx2004/thumbnails.htm. I went through the steps which were very straightforward by the way! - (many thanks to the guru that posted this tutorial!!!) The files were uploaded to my site with my images --> http://www.oregonvisions.com/Flash_slideshow/slideshow/arch2.html but I can’t seem to find where to hack into the file to make the background not only centered but have my images positioned onto the background. I tried to simply resize the area layer which is masked but that did not work. ANyone out there know how to fix this???

Many thanks in advance…

Shekman