Here's another NB pic on M16 - Luminance/Red as Ha an Green+Blue as Oiii. I processed it to differentiate the colors in the core instead of having everything red as per RGB. Maybe not accurate but pretty.
There's a full frame at:
http://www.multiweb.com.au/astro/M16_HaHaOiiiOiii_f.jpg [2.6MB]
I used the color noise reduction to get rid of the blue stars and played in PS tweaking colors, levels, curves and noise reduction.
This is about 2h of Ha and 3.5h of Oiii in 600s subs on my 5" newt.
Thanks for looking.