PART I Monday, Six Days Before Kickoff SEAN PAYTON FORGOT about today's 9 a.m. staff meeting, so he enters a few minutes late. He's in a bad mood, six days before his Denver Broncos will face the New England Patriots in the AFC championship game. He was in a bad mood yesterday, too, after reviewing film of Denver's overtime win over the Buffalo Bills in the divisional round. He hated that the Bron...