I am working on replicating a quest much like the courier quest because I can not use the Vanilla Quest ...
I notice the WICourier is also some how SMQN but I am not sure where that is or what it is. I think its like story or a branch but how do I duplicate that ?
Story Manager Quest Node. In the Object Window, under Character, you'll see SM Event Node. I do advise reading http://www.creationkit.com/Bethesda_Tutorial_Story_Manager before adding nodes of your own.