when installing a pool liner over 1 1/2 inch foam what do you do with the liner...If the liner is a bead or semi bead and goes into the wll track for attatchment how do you handle this? Im kinda confused, everyone says to lay the foam inside of the pool walls and cut to fit, but this raises the liner up the thickness of the foam and it would seem that the liner would get a lot of wrinkels...Newbie here so be patient with the stupid questions...Thanks