How to duplicate a generator below connected media?
I got the answer from someone at fcp.co. He made a video: vimeo.com/93836074

Basically: 


add the generator to the timeline (don't worry about setting the duration since you're going to delete it)
turn it into a compound clip, delete it from the timeline (since it gets added to the event manager)
copy the image frames and paste them with the playhead at the first image
create a compound clip with all images (the ones in the bottom, so there's an actual image on top)
right click to open it in timeline
select the black compound clip in the event viewer and press x then d (black gets added)
press down arrow and repeat x then d


Pretty slick