You could also take a look at CSIDE; it’s a free development tool for ChoiceScript users written by @CJW here in the forum community. It has a place for your projects and all the scenes, a code editor panel to write your game, and dictionaries, QuickTest and Randomtest, and other nifty stuff all right there so you don’t have to sort through the file folders (although that’s certainly worth learning how to do as well). And CSIDE supports multiple projects. (:
To do this on your hard drive, you’d want to copy the entire ChoiceScript main folder, and then use one for one game, and the other for the other game, like @DUNGEON_MASTER was saying . Your ‘scenes’ folder would be the only one with anything different in it between them.