No surprise here, but I'm in complete agreement with Bill: I honestly can't remember the last time that I gave a "pure" overhead press to a client...not only is there a great deal of "risk" involved for an already damaged shoulder, there's just no way to be able to safely evaluate an individual's shoulder/acromion in an eval to know their individual injury risk, IMO...especially when there are other exercises that can be used in replacement.
Karky, incline presses are safer, as would closed chain pushups...realize that any pushup or bench press will work the shoulders, so don't worry about not having an OH press in the routine, especially given the fact that you've had pain in the past.