I did a search but couldn't find anything. I would just like to direct you to Scott Rosen's website
http://www.astronomersdoitinthedark.com/, particularly his page discussing his workflow
processing DSLR images. He's got a great video tutorial (goes for 2hrs) that explains how he processes a pseudo-luminance image of the Pleiades before combining it with RGB data. Some of his images are pretty impressive and I plan to use his tips.