You can only run one live stream per board. You are allowed up to four boards per server (assuming you have the slots available).
In addition to the live stream, you can have "any number" of other multicast streams from saved files. The actual number of additonal will depend on the type of file (.AVI, MPEG1, MPEG2, H.261, etc), and whether you want to leave room for on-demand transmissions.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.