I've noticed that there isn't the posibility to play a Scenario in the Multiplayer Hot Seat Mode.
Why ?
I've sean in the LAN mode, and you have the choice : Play a custom game, or Play a Scenario.
But in Hot Seat (and in MAIL too) you haven't the choice, and you can't play scenarios, you can play only custom games.
Make that you can Play Scenarios in Hot Seat games too, exactly like in LAN mode, because there isn't any reason to erase this option in Hot Seat mode.
Why ?
I've sean in the LAN mode, and you have the choice : Play a custom game, or Play a Scenario.
But in Hot Seat (and in MAIL too) you haven't the choice, and you can't play scenarios, you can play only custom games.
Make that you can Play Scenarios in Hot Seat games too, exactly like in LAN mode, because there isn't any reason to erase this option in Hot Seat mode.