If your going to use it only for SP, then the CEP2 may not be the best thing for your game. The CEP2 has a ton of stuff in it, but unless you add it all in, via the tool-set, you will never see it in game. Since your building your own SP mod, I suggest picking, or even making small Haks that contain everything you want to add, without everything you don't, or will never use.
Most of the community has the CEP2, so you wont limit your audience by using it.