Yeah, that's what I did - find in the Workshop where someone has made Spirit Island and subscribe to that, load it in Tabletop Sim and then highlight and save each set of compoments, decks, etc as separate objects, then load a blank table and spawn in the components needed at the start of a game. Then save it, and use that save when I want to start a new game of Spirit Island. I've done the same with Sentinels - I have all the decks saved as separate objects but the Sentinels "gaming table" is just a large table with some of the electronic counter thingys (which I use for hp, much easier than dice when you're playing with a mouse cursor instead of your fingers ;)) and three randomiser bags, one each for Heroes, Villains, and Environments - the latter just has a random card from each deck while the other two contain all the character cards for their respective deck types. Then I just spawn in the needed decks from my saved components as needed. It means the table takes a lot less time to load than if you save it with everything on it :). In the case of Spirit Island I just start with one each of things like Dahan huts, Invader pieces, Beasts, etc, because I can just copy/paste them as needed :).
