An information storage medium capable of recording and playing back still picture information is provided with a first information unit having one still picture information, and a first group unit which is composed of a set of first information units, and has a plurality of pieces of still picture information having different contents. The apparatus of the present invention generally includes two main components, specifically a first extension assembly and a second extension assembly. A stop for the sprocket wheel cover having a stop surface as well as a support surface for contact engaging the stop surface are provided. The system also may comprise a network communicatively coupling the first datacenter, second datacenter, and customer interaction server. The change to the second screen can be received by the selection of a user interface device in the menu.