Thought this might be worth a look.
Here is a stack of 13x1200sec Ha from my earlier post on M16.
High Res here -
http://www.astrobin.com/186672/
I used Straton software
http://www.zipproth.com/Straton/ to remove the stars for J-P Metsavianio's tone mapping technique in one easy click. Seems a good value buy at just 15Euros.
Not perfect but it's VERY fast and easy. It's PC only so I had to install BootCamp my mac laptop (hope I don't go the hell for that!).
There are some interesting textures in the nebula that are often somewhat overpowered by stars.
Anyway, thanks for looking
Andy