Is there a way to add mixed red/blue to lobby settings?

[StalkerDellaNote]

Been having a nightmarish time setting a server. It's been hell, suffice to say I don't know what I'm doing nor do I have the time to learn what I'm doing.

Ideally would like a simpler way to host more than 4v4 but that's wishful thinking. Anyway, is there a way to do mixed Red/Blue for private lobbies without having to distribute a mod?