Check how are the photos are previewd in ViperAlley Classifieds
. There is one large photo that keeps changing when you click on the one you want to preview.
Here is an example
when you first open the ad you will get Picture 1.jpg
when you click another photo to preview it replaces the larger photo Picture 2.jpg
In the other hand the default is the same as shown in the first post. I would appreciate it if you could point me to it.