Another question–If I have a game that has a deck with 20 cards, for example, can I make an extension that, once it loads, adds 5 cards to that deck automatically so that the game starts a deck with 25 cards? Can I add two extensions with 5 cards each that allows the game to start with a 30 card deck? Or do I have to make all of these separate decks and then combine them with an action in game prior to game start?
Yes to the former. You don’t need to combine decks provided you add the cards in the extension under the original deck in the base module.