[Paul]

You can't:

-Add new paths
-Change the music
-Change an existing paths "map size"
-A whole bunch of other stuff

This is why I started making an open source version of the engine so these kind of things are easily do able.

Btw I think the hook DLL I made let you put modded levels in another folder. Then when you run the game it gives you a list of the folders and you pick what "mod" you want to run with. Can't remember how well that worked though.

So TLDR - you can't do what you want to do. But you could re-arrange paths/cut bits out etc. Editing these games really is painful.