Thanks for all the questions and comments y'all! Here is a link to another video tutorial for modding Expeditions: Conquistador with the Fabula Event Editor. This one focuses on:

creating a new event inside the RandomEvents.xml

triggering an Event

creating Event text

creating player choices

Making sure the Event only triggers 1 time

http://www.youtube.com/watch?v=s8iuVqenDIc