First off, BYU *could* make the NC game, but they would need to go undefeated AND there'd have to be NO MORE than 1 team with only one loss. They would FOR SURE get in if they were the only undefeated team and there were NO TEAMS with only one loss. Agreed, unlikely.
they wouldn't have a chance even going undefeated. they play TCU and Utah, but that wouldn't be enough to get by a FLA, USC, OU, GA etc ALL with one loss. Even with 2 losses one of those teams would most likely get by them to the BCS title game. See LSU last year. See Hawaii, and Boise St the last two years consecutively. this isn't just my opinion, it's from a few of the pollsters that I speak with that know a lot about the in/outs of the BCS system.