Currently with LabVIEW Scripting you can very easily create an event structure and add new event cases to the event structure. Unfortunately, for some reason, you cannot programmatically configure the event case after it's created. I think there should be some way, via property nodes, invoke nodes etc, to accomplish this.
PS.. I would love to be wrong about this. If you know of how to do that, feel free to argue it in the comments and we'll get this closed as completed 😄