Jim Solomon has revised and updated his Astrophotography Cookbook. Jim walks you through acquiring and processing your DSLR images using IRIS. I do not always agree with Jims steps but he has done an excellent job documenting the whole process.
I use IRIS to process the RAW images from my camera. IRIS is not the friendliest program in this area but has many features I like (can’t beat the cost either: freeware). I find the save to PSD format function very frustrating since I know it could be implemented better.? Hopefully this will be improved in the future or maybe I’ll get off my butt and write a PIC to TIFF or FITS converter.