3D Globe image gallery - navigate to url from image thumbnail

I have found an excellent tutorial and source file for a 3D image gallery.
However I would like to make the thumbnail click thorugh to a url link when pressed rather than loading the image into the gallery.

Currently the images load in through actionscript. Is there a way to amend this script so you can specify that a thumbnail clicked links through to a url, like you would with a normal button instance rather than loading the image.
Here is a link to the file and tutorial. The actionscript is on the top layer within the file.

http://www.flashandmath.com/flashcs4/spheregallery/index.html

Your help would be greatly appreciated.

Thanks!