Computer To Plate :: b/w to process color

Computer To Plate :: b/w to process color
Rural weekly paper going from b/w to color. We use InDesign, a Harlequin RIP, and Screen platesetter. My question regards the setting changes we'll need to make to get the color to come out right. How do we process the photos to come out right? Do we need to change LPI/dot shape/angle settings, etc? Any direction would be helpful. - Read More at This Link..
http://software-robotics.com/graphic-design-prepress/viewtopic.php?p=7200