Trexmist

Hey all, me and a friend have recently gotten into sins of a solar empire Rebellion more, including the excellent modding scene involved with it. And we had some interesting ideas, but no idea how plausible they may be. I have only a very minor background in modding. My main question is this: is it possible to take a base mod - say, sins of a galactic empire or sins of the prophets - and add races from other mods into said mod? The idea being that you can have the races