XML Slideshow-adding supporting images?

I love the XML slideshow code that I found on this site, but I was wondering if anyone knows how to expnad on it- for each image that comes up in the slideshow, I want 2 or more smaller images to come up beside it (i’m making a portfolio site, and each small image will be part of the campaign relating to the large image). The even trickier part is when someone clicks on the smaller images, their larger image should come up. Can anyone point me in the right direction to achieve this?