Tone Mapping w/Photomatix Pro 3.2 (64 Bits)
Curves and Levels adjusted w/Adobe Photoshop CS4 (64 Bit)
noise filtered w/Noise Ninja 2
3% Digtal noise removal with PSP 12.5
M42 cropped stack of 11 images
with an Astronomik CLS Light Pollution Filter
and a stack of 9 images No filter combined with PictureWindow 2.0
Levels and Curves adjusted with PhotoShop CS3