This page is obsolete. Tarl has been superseded by TARDIS. There is a full description at this N3V Blog page (link valid as of July 2013).
Tarl is the place to find out what to do to fix a config.txt file, or to find a missing asset. You can also post your fixes to a config.txt file for other people.
TARL is undergoing a thorough review at the moment. TARL was corrupted during a severe electrical storm in 2007. Many fixits were lost and some of the functionality. We hope to resume uploads by the end of 2008, but first we have to determine what's missing.
As an adjunct to the database, more detailed instructions on how to use TARL will be provided.