I dropped the data over to Scott Alder this morning to see what he could come up with - hope you dont mind scott but i will directly quote your email:
"Howdy
Gee the data is excellent. Pin sharp focus and tracking. I didnt use all the subs though as the they were light polluted at the start so I started from where they looked not too bright, ended up being the last 40 subs. Processed with darks flats and offsets. With Iris I find I dont need a heap of darks flats and offsets so I ended up using 10 darks and flats, and 3 offsets. I put them all through Iris and let it do its thing. I use an alingment method where Iris draws 3 small boxes (300 pixels each) atound the edges, and aligns with those to ensure no field rotation.
I didnt need to use Gradient xterminator, as its better with isolated objects like galaxies rather then large patches of nebulosity. Instead I used Iris's automatic gradient removal, which seems to work best for removing a gradient that steadily increases from one side to the other. I then used the white command to neutralize the background colour, then finished it off in Photoshop
Again, its damm good data, and an excellent image result
Scott "