I would second the slingbox - if it is an option. If not, your best bet for college football in europe is North American Sports Network (NASN), but it's pretty bad. They typically will only televise 3-4 games/ week, so it's a bit of a crap shoot that they will show Michigan. That said, the two games you can usually rely on them showing are Notre Dame and Ohio State.
If you are in London, head to Sports Cafe (I don't recommend it under normal circumstances, but they show American sports) or Bodeans. If you are in Paris, Madrid, Prague - I would think your chances are doubtful.