Ok, so following Norbyte's suggestion, I looked for and found the starpoints in the game files. For anyone curious, the starpoints for character spawning are locacted in
Data/Mods/Main/Levels/CharacterCreation/Triggers/triggers-BAS-PC2014
In this LSB file, there are two game objects named Starpoint_1 and Starpoint_2 respectively.
These correspond to player 0 and player 1.
So I promptly copied Starpoint_1 and changed all the corresponding numbers to 3 and 4 (or 2 and 3) respectively. I then tried loading my game only to have the game lock me out of starting a new game saying the main mod is corrupt and multiplayer is unplayable.
Issues with the new GameObjects I've created include:
1) both starpoint_1 and starpoint_2 have unique MapKeys that I don't know how to recreate for Starpoint_3 and _4.
2) Any positions or rotations i set in the gameobjects subnodes are not saved and always revert back to 0,0,0 no matter what I try.
This being said, it's at least progress. I found the spawners in the game files. Any ideas/help?