Gruden's Scouting System Led to Divide in Building   Raiders coach Jon Gruden broke down film a certain way when he was preparing for games in the Monday Night Football booth. That method has not changed now that he's back coaching.   But the manner in which he evaluates personnel -- and the people who have his ear -- has led to a disconnect in a Raiders building filled with people still trying to adjust to a new way of life.   According to sources, Gruden essentially h