My answers to the questions (they might not be "right" but they're what I would do):
1. Address a Novus Ordo priest according to his title if you are speaking to him, e.g., Father Crackers, Bishop Blarney, if that's how you would normally address a Protestant minister with a title. If you are talking about a Novus Ordo priest, you should do the same. Remember to be courteous though one should not ignore facts if the subject of valid priesthood or heresy should come up. Please note that being attached to the Novus Ordo does not make one, by definition, a heretic.
2. If you are talking about the Novus Ordo priesthood (as a class and not individually), I refer to them on those few occasions that I do as Novus Ordo priests, but any sort of reference that indicates they are not traditional priests is acceptable.
3. When talking about claimants to the papal throne, I usually write, for example, Benedict 16 and say "Benedict sixteen". When talking about actual popes I would write, "Pope St. Pius X" or "Pope Leo XIII" (sometimes leaving the word "pope" out depending upon the context) and say, "Pope Benedict the Fifteenth".
4. As for confession, I have been told that one should make a general confession every few years anyway, and, while it is not possible for most people to remember every single sin confessed to a false priest, one can do they the best he can.
5. I have been in a Novus Ordo church. I am respectful. I don't talk on the cell (or even text). I keep my voice lowered in defference to others. I don't genuflect. In short, I act the same way I would in a Protestant church or a movie theatre. Be polite.