As for the Packers' rushing attack, we'll rely on the 3-back stable: Monty, Michael, and Ripkowski. Monty has impressed with his ability to show patience and make timely reads/cuts. Not bad for a WR-turned-RB. Michael runs hard, but I do worry about his lack of football IQ. That has cost us on a few plays here and there. Rip is a beast. Sounds like you all don't think too highly of him, but he's been able to contribute when he gets the ball. I would not want to take him - the dude runs HARD.
Collectively, it can be a productive group when used properly. We don't have the best run-blocking line - the Cowboys are far superior in that category - but we've had some success when necessary. They'll need to be somewhat successful if the Cowboys go to the 3-2-6 defensive alignment. That would open up the play-action. Of course, when used improperly - like McCarthy running Monty on the 4th & 1 last week - it can be a problem.
Overall, you guys have a huge advantage in the running game, but I think you'll be surprised with how effective the Packers can be running the ball.