Hi Shane,
this is a very good effort really.
As Greg mentioned, there is a significant magenta cast... I'm seeing this to the outer halo of the neb and around some of the blue regions.
For good tutorials on using PS, Louie Atalasidis, an IIS'er, has some good basic techniques to help you out.
Here's a link..
http://www.atalas.net/
Have a look at some of the top astro photographers sites, they often have little tutorials...
Go to Robert Gendlers site, he has a few that might get you started..
http://www.robgendlerastropics.com/
Other than that, for a few bucks, Noel Caboni's actions are great and you won't look back...
Once you learn a few techniques in PS, your imagination kicks in and you'll start finding lots of new ways/ techniques to bring out the max of your hard earnt data.
Rich