There are many options available to you to accomplish what you are looking to do. For example, you could create a "Container Prompt" that includes both the "All operators are busy" prompt and the music. You could then use the Container Prompt as the prompt for a "Menu" or "Get Digit String" step.
For more information please refer to the following documentation: Getting Started with Scripts:
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.