Swapping Stock Tracks or editing them is one of the ways of selecting permanent locked tracks. This method is useful to access hidden tracks like Frontend and Intro Sequence, and also for tracks from a different than Single Race, as the Battle Tracks or the Stunt Arena. This method is used more in the legacy versions of the game (from the original CD-ROM). Using it in Re-Volt 1.2 or RVGL will be like a waste, since the -dev switch can be used to automatically unlock the hidden tracks. This is very useful in the Re-Volt demos too.