Sorry to double post, but I got it working! I had started the PM Injector before the game, and that caused the stories to break. I then reinstalled the game, opened it first, and then started the PM Injector, which then worked and the mod itself worked as intended! I hope that when I re-open the game it doesn't have the same problem even if I repeat the same process, or that at least if I have to uninstall the game the progress is saved...