Mariner, if you want to install the spring loaded mesh cover yourself, I'll give you some tips on doing it (the company I work for installs 30 -50 of them a year). You'll need a hammer drill and a new 3/4" bit (Home Depot should rent the drill, but you definately want a new bit - we pay ~$85 per). This also ***umes a concrete deck at least 3' all around the pool, if you have a different type deck, let me know. Also, is the pool ~ rectangle?
If you want to tackle it yourself, I'll gladly tell you how to do it, but the post will be a long one. Good luck, whichever way you choose.