Nce find on that site, will have to check that out.
Try dropping the iso down to around 800 and shoot longer exposure if needed. 1600 is a bit high and will pic up the pollution very easily not to mention noise.
It take a lot of trial and error and each spot you point the scope will be different.
I took this sngle frame test shot last night in my polluted back yard. 2min exp at 6400 and was blown away how well it came out for a test shot. Taken with a 8" Newt, MPCC and 600D on EQ6 pro. Still haven't finished the proper stack of 15x1min subs @800 ISO yet. Would have taken many more but the neb dropped behind my shed :/
http://www.facebook.com/photo.php?fb...type=1&theater