We got a video at Home Depot or Lowe's about laying our laminate, and it told the Hubster everything he needed to know. I would fill the crack in the cement, though. And there is a lining of some sort that you're supposed to lay between the concrete and the laminate to keep moisture from leaking up. There was also a special hand tool he bought (they recommended on the tape) that really made things go more smoothly. I don't think it cost too terribly much.