AS3/Flex Image Previewer

We're soon to launch a new marketplace that allows graphic designers to sell high end print templates (brochures etc). When someone sees a design they like from, say, a search result, we want to enable them to click on the small 500 x 400 thumbnail image preview to launch a full screen viewer to get a better look at the design. And, while in full screen mode they could cycle through all the photos of that design before deciding to buy or not. More detailed instructions are contained in the [login to view URL] file which is attached with the graphic design.