Since an epic is a really large story and is usually broken down into smaller stories, I see two ways of working with epics.
1. You treat it as a large story and add tasks to it. (this seem to be the greenhopper way)
2. I would like to add stories to it, only - not tasks since they goes into the stories.
Those stories are then added to a sprint
Regarding #2 - is this something you have thought about or is it way off how greenhopper is intended to be used?
#1 makes an incorrect assumption, in GreenHopper you can and should split epics into stories which you then task out. In GreenHopper 5 Epics are supported, in GreenHopper 6.1 Epics have been added, more info at:
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