Yeah, when UtM left, he said a few times in public that he never signed the PlaneShift NDA/licence. Therefore, none of his stuff can be used for the game. Before XilliX's untimely demise, he had everything rewritten.
So if you use these "histories" for your RP, you're likely to be contradicting the stuff that the team has had to work hard to make, delayed by UtM's lack of copyright handover. Let's just say if he had signed the document this would be ingame, but because he never did, it CANNOT, therefore, since you prefer a good pure RP, I wouldn't suggest you use this for the simple fact it sadly can NEVER be official settings.