To add your own broadcast, simply announce it on any channel listed on BeamStat. It doesn't matter what you write in the announcement, but it is important that you send the announcement from the broadcast address. When your announcement appears on BeamStat, you can start sending broadcast messages.
The broadcast messages should appear right away. But names are assigned manually so it may take some time before the name of the broadcast appears.
For technical reasons only version 4 addresses are supported.