Hi,
TWG had the problem that when your where renaming or moving folders you had to manually rename the xml files. now this is solved ;):
New: $autocreate_folder_id added. Since 1.7.7 you can use a folder.id file which is the prefix for all xml files – You can now create this file automatically with the current directory in it. This enables you to move folders without loosing any xml data like comments or tags.
http://www.tinywebgallery.com/forum/web-photo-gallery-news-f14/
Have fun,
Michael