Horizontal scroll won't stop scrolling!

I’ve got a problem with nice horizontal scroll bar (originally from Claudio). It won’t stop scrolling! There seems to be no way to set the end x coordinate for it in the as layer.
This would be the perfect thing if only it would stop scrolling empty space at the end
of the images. No matter how many images you have in there it will still have that empty white space at the end of the scroll. HELP ANYONE?

Attached fla.

I’ll paypal $10 to the 1st one who will fix this succesfully. This should be an easy fix.