New quarterback Kevin Kolb says he is finally comfortable with the Cardinals' offense and looks forward to putting his newfound knowledge to a stern test when the team travels to face the NFL champion Packers. "Besides the game-planning part of it, we're pretty much done with the core install of the offense now and I understand it all and feel comfortable with it," he said before the week's final practice on Wednesday. "Now it's just a matter of going out there and getting enough reps, and that's vital."