Kerry Collins is confident that he can perform well in place of Peyton Manning as the leader of one of the NFL's most explosive offenses. Manning (neck) is listed as doubtful for Sunday's opener between the Colts and Texans. "I know what it takes to prepare and be successful in this league, so I'm going to do all those things, rely on all the experience that I have," Collins said. "I have a good idea of what I need to do to get ready to play and give a winning performance."