Since PlutoT6 didn’t really add any commands you can use any dump on the internet.
As long as you don’t want to play on Steam or Console or have the spare time to implement support for the lobbysystem: NO, there is no way to join a lobby.
23.06.2019: Started to add screenshots.
26.06.2019: Added more screenshots, basic set-up and preparation for a RCon tool is now covered.
17.09.2019: Changed the link of the IW4m-Admin documentation to the master branch.