Hi,
while ago I wrote about nebula outlines. Now there is an editor which makes it pretty easy to create new outlines. 
I also already have many outlines done. My plan is to finish large bright nebulas and Barnards dark nebulas soon.
It is done for Asterope and Galway Sky Atlas, but can be used anywhere.

Video tutorial:
http://www.youtube.com/watch?v=pbpv44evDsI

Binaries with outline editor:
https://github.com/downloads/jankotek/asterope/asterope-0.1.snapshot-bin.zip

Nebulas already done:
https://github.com/jankotek/asterope/tree/master/data/dsoutline

Regards,
Jan Kotek