Also if you use the color picker in Photoshop and you pick a color ouside the CYMK range, PS pops up the little "!" in a box near your before and after color boxes, if you then click on the "!" PS will set it to the closest printable color, or at least what it thinks is the closest. Biggest disadvantage of working in CYMK is it takes 1/3 more memory for you image, as I'm sure dlm knows.