You could have a look at Ken's tutorials.
http://www.imagingdeepsky.com/Presentations.html
There is one there for clipping masks and colour mapping for NB.
But it may be a little advanced if you have no experience.
http://bf-astro.com/hubblep.htm shows how to get hubble palette.
I can't upload raw files for you, it's a huge amount of data. 20meg per sub. Last image I did was 87 subs + flats + darks + bias files = 2520 mega bytes total.
That's 2.5 gig.
Here's the final image.
http://starshed.net/gallery/displayi..._display_media