How to separate your DSO from your star field and process them back together

Example: M51 by Anna Morris

In this video I show two ways to take your image and separate the stars from the galaxy/nebula/other DSO and put them back together after processing so they look natural

NOTE: Camtasia does not yet capture well the new way that Mac OSX Lion zooms (in the little grey box that shows on the video) so unfortunately you will just see a grey box shown around the area I am referencing rather than a zoomed image. Hopefully this will be fixed soon, but at the very least you will be able to see the area I am referencing.