Hey Jeff,
I've only just been reading about the Star Analyser and Visual Spec... but shouldn't the primary image be on the left?
Just based on what I've seen of the examples on the Visual spec web site and tutorial, they all have the primary image on the left...
BTW I have seen an example on the visual spec or star analyser site that shows nebulae spectra, which should exactly answer your question (I think) but I haven't found it yet.
Does anything here help?
http://www.astrosurf.com/vdesnoux/tutorial.html
Al.