The images in Joomla on MAAVS.ORG are in the directory:

   /www/images/stories/

Each individual convention is denoted by a year such as:

   /www/images/stories/2010

Under the year are sub-directories of setup, winners, candids, vendors and any other convention specific category of pictures.
Once inside the html for the web page, the pictures are designated with the tags:

   {gallery}1996/Part1{/gallery} 

In this case the gallery photos are in the directory:

   /www/images/stories/1996/Part1