This is just a note for any that follow in something like this.
First off, the generic "species found" event (the text of which is in RACES.lua) does not trigger with Epic Systems planets. You have to create planet and star events to replace them.
Second, apparently the events are baked in to the system when the map is created. A trap I fell into is that if you add or significantly change an event, you can't test it until you make a new map.
Insert "The More You Know" bumper here.