To remake the game would be not worth your time, however it has been done to unlock files using the Emergency 4 editor, showing the developers lack of a new game, but regardless. This is also a tidbit. If you work hard, you can techincally unlock files, import them into into the emergency 4 editor, and theoretically make a whole mod there. I've been experiementing on and off, and I know others have too, and you can get prototypes, skins, files all sorts of things, so by no means is this game fully mod-able, however there are ways to mod it. Now that I've borken the news, and how to do it, have fun doing it