There is a way, but it's far from perfect. Create your GM module, have your party role chars, play the game, then save.
So when you want to create a new adventure and take along the same characters, use the prior saved game as the starting point.
You can even zip up the saved game and send it to another member of your party to be the GM (though it would be a good idea if everyone, including the original GM, had rolled a character for that first adventure if you have a spare license).
We've tested this, and it works. We're planning on starting a new set of campaigns using this technique.
