JJ,
You must be frustrated not to get any answers. Unfortunately none of the mods are into liner installation. You seem to get the idea about the diving board and the only thing I would have added is to take the board off and use lumber and towels or plastic dropcloths to cover the studs for the board and give you a smooth and lower surface to drag the liner across. I'm kind of surprised nobody has chimed in here and on your other threads. Don't get discouraged with the forum.
Al