Make sure the pool is dry and clean.
Tape up any sharp edges that could tear the liner.
Use the push broom to smooth the sand bottom of the pool.
Open the liner, and gently stretch across the pool, it should hang well past the edges of the pool.
Begin filling the pool with water.
Adjust liner, every ten minutes or so, by walking around pool and lowering as necessary.
When pool is four to six inches from full, stop.
Remove rails from top of pool edge, a few at a time, tucking the liner into place as you make your way around the perimeter of the pool. Replace rails.
Fill the pool with the remainder of water. The weight of the water should make the liner lie taut and unwrinkled.