Scrolling image gallery advice

Hi all, I’ve looked around all the posts and examples on image galleries, so I’m looking at advice on one that I’m going to build.

Functionality
the viewer sees 3 images on screen on top of each other, with the middle one being 100% alpha, the rest 50%. There is a list of image groups to click on on the left hand side of the screen.

There is a previous and next button which will scroll the images up and down. The images also need to loop. For example if there are 5 images, then the user sees image 1 in the main screen, with the last item in the list above it, and image 2 below it. Each time the next arrow is pressed, then the image number goes up by one until it reaches the last item, then it resets back to one.

Ease of use
I’m thinking using xml will be the best way for loading these images in. Each section needs to be loaded seperately. ie image group1 image group 2 when the links on the left are clicked.

Does anyone know of any examples that can help me with this project?

Regards

Richard