I suggest gathering enough players and holding a tournament similar to "Treasures of the Sands." The tournament format is the same (I don't know about the battles, as I haven't played).
There's a map (if I'm not mistaken, a tournament was held on it) where players choose their units, skills, and other things at the beginning, and then have a battle, a duel.
Tomorrow, I'll try to get my HoMM III disc and then clarify the map's name (Cash should definitely remember).
But this is, of course, if there are any willing participants.
The advantage is that the games won't take too long.