Track Rebuilder/Sorter
From TM Wiki
Trackmania Track rebuilder / sorter is a program that will rebuild track filenames based on the data found in the gbx track file itself. It has options to remove the formatting in filenames, delete duplicate tracks and sort the tracks in diffrent directories based on author, environment, mood and challenge type.
Grab it here: http://www.willemssoft.be/index.php?main=5&sub=8&action=productdetails&id=233