I have been a pro photographer for a long time and have always followed the counsel from Scott Kelby books on "color correcting digital camera image." The PHotoshop Book for Digital Photographers. In this books and others, he recommends going into the curves setting for RGB and changing the values for highlights, mid tones and shadow areas, then on to do the same thing in cmyk too. I have always done this with each version of PS. Is this still necessary?? I always end up with great color but never see this info anywhere else. Am I wasting my time? Thanks for any insight.