The NFL season opens tonight. We've already given you our astute and accurate take on the Houston Texans. (9-7, if you must know.) But what about the rest of the league? Do you actually want to sit through all the games, or learn what will happen in the next few grafs?We thought so.So here is how the season will shake out.AFC South -- Peyton Manning learns what life is like on the downside of your career. It involves many sacks, or throwing the ball to the stands in order to avoid a sack. It