Make sure that you READ. PMR is a learning process, where you start with the basics and adjust for your dog. Chicken for a month (no organs or liver), then slowly start adding in other meats and organs. Remember, do it SLOWLY though. Cannonbutt is terrible, especially when it comes at 3am...
For pups, you want to spread the 2-3% over a few meals a day. If you start to notice that she's getting chubby, or is losing weight, adjust her feeding amount accordingly. Some dogs require more or less than others.
Join groups to help you out more (yahoo, facebook, etc.) PMR peeps are always willing to help you out.
Good luck! Its so cool watching your dog eat what its supposed to eat.
PS: DEFINITELY look into getting a deep freezer though. It'll come in handy when you find a great deal somewhere and want to stock up!
OH, and STAY AWAY from meats that have added seasonings, or are "enhanced." Sodium and seasonings are definitely not good for dogs, plus they can trigger cannonbutt.