De-noising a wide angle short exposure night sky photo

Hey Guys.

While since i posted but have been dropping in and reading regularly.

Ive had some ok results of taking wide angle shots of the milky way and Andromeda but having difficulty getting good results after removing noise.

What do you guys use to denoise long exposure images from conventional consumer DSLR's?

Im using a Canon 5D Mk2, through a Canon 24-70 F2.8L, 30 sec exposure, ISO 1600.

30 seconds is short enough that the stars are still circular. My main problem though, is noise.
Ive tried using the denoise in photoshop elements but its not great.

For a single frame shot I use the long exposure noise reduction in the Camera menu settings. It's works reasonably well. I keep ISO below 1600 (max). Alternatively stack several exposures in deep sky stacker using a few dark frames. This also gives good results. Example below is a stack 10 second frames (no guiding)

www.flickr.com/photos/7703127@N07/8351771202/in/photostream/

Take dark frames.

Thanks John, Deep Sky Tracker looks like a massive step in the right direction.

AstroTrac is also looking like something i might want as a combined xmas/birthday present!

Aside from the DSLR noise reduction or some Photoshop plugin your best bet is what many have already indicated, use stacking. DSS is free and extremely good. You will have to take darks and Bias, plenty of information here amongst other places: deepskystacker.free.fr/english/theory.htm

Hi, just about those dark frames, should they be the same exposure as the actual exposures?
It is not necessary to take them in the optical system and keep orientation of everything?