Given their status as non-BCS, they have to be more than just perfect to have a shot. Only beating Tulsa by a TD is going to be enough for voters to continue to pass them with 1 loss teams in the voting even if they go undefeated.
The fact that OU beat Tulsa 45-0 tarnishes that win by Boise. Even though they beat an Oregon team that may end up winning the Pac 10, they won't get the chance at the title game.