[asozio]

You need to do rcon_address <ip> followed by rcon_password <password> and test it is working with rcon status.
AFAIK the rcon commands only work when you aren't in the game, some weird bug I've heard people talking about.
I haven't done any work on the map groups, apart from copying over the sample game modes text file, but there are supposed to be configurations that I just haven't looked at yet (only got this working last night before playing for several hours, then slept)

I have very minor configs set in the server.cfg (i think) for host name and rcon password.