I am not a expert but I would not even think of doing it myself, I would asume they are (Glued) in and where you could
brake that seal getting a new on back will be your
problem.
Plus you could get a leak and if not done correctly could be a MOT fail, and as the screen is part of the strengthening of the build in a accident you might regret it.
Whats wrong with getting it done with the insurance usually its about £75