The folder /storylines contains XML files which will be imported whenever you create a new league. 
The default storyline files are inside the folder /storylines/default
You can add your own storyline files right here in /storylines, they will be loaded automatically if they are XML files.
If you add a folder with a specific saved game name, on new game creation files in that directory will be loaded. So if you create a folder called MyLeague, and create a new game called MyLeague, storylines in the MyLeague folder will be loaded.


