As Aaron said, with the standard software it couldn't be posible as far as I know, don't even with macros, because for running a macro, at least the CAD should be starting up once the agent write the credentials in the fields of the CAD. Maybe you can start up automatically the CAD by putting the .exe in the start up folder of the agent's machine, but I think you will need the .dll to be in that folder too, which means that a lot of windows will appear in the desktop of the agent's machine.
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.