Actually, Dr. Montague was responsible for something entirely different. Not newmans, but casts. His experiments were more in the way of him trying to make casts even more human-like by increasing their emotional capacity. Kind of like a Blade Runner thing. If PSU/PSP and PSO were actually linked, that would be one believable aspect of the transition. Since Casts seem to move, utilize body language, and throw emotions around more than ever in PSU/PSP than they did before.