Eric, thanks for taking time out.
The images on that site slide via clicking the + or -. The sliding is in flash.
Guessing if there is a way to create a full browser slider, that would be a start. Then be able to have it user controlled (you know click to slide in the next).
From there, would need to figure out a way to have a menu sit to the left above the images that are sliding in.
Easier to think it, then make it.