After a VERY long process (headache) of unpacking and loading .sga files deep in the game, I've managed to convert a single player campaign map into a full-fledged 3v3.
It's called Return to Helios, and reflects a post-Ork environment.
I'd like some feedback and testing on this guy from people that can catch things I might have missed.
If it goes well, I'll turn the whole single player campaign into workshop maps for us to enjoy.
Thank you Relic, thank you Community!