How can I load an external image using this carousel code

I found this beautiful carousel ported to actionscript 3.0.
http://board.flashkit.com/board/attachment.php?attachmentid=63497&d=1188450564

How can I change the code so I can click one of the carousel images and have it load the companion large image located in a different folder into a movieclip on stage.

I am a newbie to AS3 and struggling to learn how to do things.

Hopefully, someday I will be smart enough to contribute to the forum with intelligent submissions.