Please suggest a module/method/script for a simple jQuery dynamic image rotation

I am trying to create an image gallery similar to Galleria: http://devkick.com/lab/galleria/demo_01.htm#img/grass-blades.jpg

I have a node type that has an Imagefield with multiple values. I use Contemplate to override the node output. I have the bottom part of the above example figured out: I use JCarousel where I place the thumbnails. Now what I don't have is a simple method that changes the main image when a thumbnail is clicked.

Can you point me to an example/tutorial where I can borrow some code from? The key is to have some documentation/explanation because just looking at Galleria for example, I cannot figure out how it's done.