Remove all hardware from the door. If desired, sand, prime and paint it.
Use the drill to attach the four eyebolts to the door, one at each corner.
Measure the distance from the porch ceiling to 19 inches from the floor. Cut four chains to this length. Attach one end of each chain to each eye bolt. Attach a comfort spring to the other end of each chain.
Attach the swing hangers to the porch ceiling support beams. The hangers must be put into beams that are at least two inches by six inches. Attach them so that they are distanced the same as eye bolts are on the door. Have a friend or two support the door as you hook the comfort springs into the swing hangers.
Slide the mattress into the plastic cover to weatherproof it. Set it on the hanging door. Cover the mattress with the fitted sheet and top with cushions.