Due to old code in the the index.php file, the details checkbox wasn’t displaying file information and thumbnails for file lists in custom directories. This has been fixed and re-uploaded in a new .rar file of this project. The link is the same as the last one.
Comments and feedback always welcome. Thanks again, Mike, for the assistance and to [d]online commenter, TimD, for pointing this to my attention.
Complete FLA, PHP and file structure source files with options for Custom Directories and File Name Rewrite (with bugfix).