[huntercc]

I got it, but it involves creating a new file. I got this from reviewing the Authoring Kit documentation, and the Savage Worlds source files:

1 - Create a new file called MySources.1st (the name is unimportant, but it must have an extension of .1st) and save it to your "pathfinder" data directory

2 - Insert the following code and save:

<?xml version="1.0" encoding="ISO-8859-1"?>
<document signature="Hero Lab Structure">

  <source
    id="SGG"
    name="Super Genius Games"
    selectable="no"
    sortorder="0"
    description="Any description you want">
    </source>

  <source
    id="SGGMon"
    name="My Monsters"
    parent="SGG"
    description="Any description">
    </source>

  </document>

3 - Just add your child source to any "thing" as you normally would

4 - Reload the data files

I've tested this successfully myself, it should work for you as well!