Adding new Spell Schools with current spells

[Eklypse0]

I've been trying to figure out how to get into the editor to add "Spectrum Shift" / "Color of Magic" Spell Schools on top of the standard spell schools that Pathfinder already has.

I've copied the Pathfinder game as Pathfinder_Plus. The I can't seem to find the files top open in order to edit/add the schools. Or if I were to add the 8 schools + 3 Spheres each School, how would I connect them to the spells in game?

An example:
Black School includes the Spheres of Firmament, Guardian and Negation.

The Firmament Sphere Spells-
Magic Stone 0
Bear's Endurance 1
Meld into Stone 2
Stone Shape 3
Spike Stones 4
Stoneskin 4
Wall of Stone 5
Bear's Endurance, Mass 6
Move Earth 6
Stone Tell 6
Wall of Iron 6
Statue 7
Iron Body 8
Earthquake 9