The title says it all. I want to create a game where you can change between characters all with a different inventory. What do I do?
That's in the BFAQ (http://americangirlscouts.org/agswiki/index.php/Graphics%2C_Characters%2C_Text_%26_Rooms#Having_multiple_characters_in_your_game).
Different characters have their own inventories by default, all you need to do is switch between them (http://www.adventuregamestudio.co.uk/manual/Character.SetAsPlayer.htm).