This is an example of a Slide Show 4 skin album where folders are used. If you click on one of the lower 12 pictures, a new index page for the pictures in the corresponding folder is opened. One project file is used to generate these albums. Check-box 'Variable number of thumbnails per row' is cleared and check-box 'Elastic table with <div> tags' is set, see also this note.
Click here to see another more flexible implementation where this set of albums is made with 13 project files; in that implementation it is possible to give each sub-album a set of links which applies to that sub-album.
Click here to see an album without folders and click here to see an album with movies.