Good information, but for those of us that have to experience, use as a step by step with your camera and .RAW images at hand.

It is great to be able to tap into the knowledge of a writer with such deapth. For photographers it clearly explains the power and use of one of Photoshop CS's most valuable features. If you haven't started exploring the capabilities of this awesome feature then this is how to do it with training wheels. Great stuff!!

Since writing this piece, two things have become clearer to me-I pass them on in the hopes that they'll save some time.

1.) In theory, any RGB should work but in practice it seems that it's much easier to do this exercise in ProPhoto RGB. The resulting calibration will work for all the supported output spaces, so you aren't locked into ProPhoto RGB by doing so. I suspect that the reason is that Camera Raw uses a space with the ProPhoto primaries and linear gamma for most of its processing.

2.) It definitely helps to do the edits in the following order:

Shadow Tint
Green Sat
Green Hue
Blue Sat
Blue Hue
Red Sat
Red Hue

Digital cameras have a much stronger response to red than to either green or blue., Making the edits in this order helps bring the reds back into a reasonable range.