Image transition in Kirupa Gallery Tutorial

I worked through the Kirupa Gallery with Thumbnails tutorial. I am a novice, but quick learner. I would like to change the gallery so that when I click on a thumbnail, the large pictures also scroll into place–like this gallery: http://www.digicrafts.com.hk/components/fc_galerie.php

I imagine I have to change both the script that displays the large images, and the the thumbnail portion.

Thanks!