I'm not very good at modding, and I constantly require a tutorial to help me get through it. Sins of a Solar Empire Trinity is owned by a buddy, and Rebellion is owned by me. I was curious if:
We'll be able to play them together.
Use the BSG mod Sins of the Fallen/Fall of Kobol, which may be obtained here (The Mod)
I believe it is doable by disabling specific races, but as I already stated, I am not well-versed in modding.