I don't run a journal game atm but I'd definitely be using the Universal RPG- it's very clear, very handy, and awesome in general. That aside, before URPG system came about, I would stick MA (Mature Audiences- a rating they put on video games) as the rating, because so many 'R' sites seem more like 'slightly relaxed PG-13' and that wasn't what I wanted my games to be.