If Utah were to join the Pac-16, here would be their 2012 schedule:

Oklahoma
Oklahoma State
Texas
Texas Tech
Arizona
Arizona State
Colorado

Team from Pac-16 West (could be any of them)

BYU (I'm sure the rivalry would go on)
Utah State (already have a contract to play that year)
Boise State (also have a game scheduled that year)

I-AA team (to finish the schedule)

They could probably finish anywhere between 4-8 and 8-4 (if I'm being really generous).