Hello
I wanted ask abou servers with no expansons listed.
When you are in server browser and mark server there should be something in the right down field listed - expansions / DLC / mods, but there is nothing.

I have joined that without any mods, but server was using RHS and few others, and i didnt see textures but was able to play.
How can i set that kind of server? (with optional mods?)

VerifySignatures

Can I do it without hosting dedicated server?
I play only with few friends, and host server on my machine.

private hosted servers should be relatively lenient. Major mods that are missing will stop them connecting though, if you're just playing with friends I don't see why it'd be a problem setting your mods up the same.

I'm not sure of any other way.