Answer is assuming CCX 8.5 since you failed to specify.
I have no idea what you mean by "=SET". Enterprise Data in CAD is entirely up to you though. You can get the Trigger Name using the Get Trigger Info step, store it to a String-type variable, and then use that in your Set Enterprise Data step. Presumably you would use an ECC variable that you have created within Desktop Administrator and added to the Layout List that you want to use. More detail here: https://supportforums.cisco.com/message/1047577#1047577
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.