they are using a .js for the gallery
if you view source on the page, you can see where each image calls to the script and you can see the include code for the script
<script language="JavaScript" src="photos.js"></script>
http://www.dimensionsplaster.com/photos.js
follow the link below, it will lead to a test.zip file on my server...
this gives you the gallery page, images, and the scripts used for their gallery, if you really wanted a gallery like theirs, just remove the menu script and such, take out the images you dont need, replace gallery images with your images, copy and paste the code from their html file into your file, remembering to make the paths relevant to your set up
vervedevelopments.com/test.zip
_________________
Smile