It is possible to references nodes in another conversation in the Script Editor and in Conditions.

To do so, you just need to reference first the conversation through its ID, and then the node dialog (also through its ID), like so


Conversation[id].Dialog[id]

 

For example, to change the SimStatus of a node in another conversation, you'd do

 

Conversation[id].Dialog[id].SimStatus == "WasDisplayed"