Well, I haven't tested it, but I'd believe the priority byte and the effect byte would have to be set to make say, Quick Attack work. It seems completely anal, so it's probably true.
For the ninth byte, is this also determining Attack Moves and Special Attack Moves? (32 for Special Attack Moves and 33 for Attack Moves)
Nah, there was no attack split in the 3rd gen. Contact is really just used for ability triggers.