1. A method of creating highly registered quality pictorial color images using tri-level xerographic modules, the method comprising the steps of: (a) uniformly charging a photoconductive member of a first tri-level xerographic module to a predetermined voltage level; (b) creating a first tri-level latent electrostatic image including custom CAD image areas and custom DAD image areas, having different voltage levels respectively; (c) developing the CAD image areas and the custom DAD image areas of the first tri-level image with a first color and a second color marking materials respectively to form a first composite color separation image of a desired final pictorial image; (d) transferring the first composite color separation image onto an intermediate transfer member; (e) similarly creating and developing, on a second tri-level xerographic module, a second tri-level image using a third color and a fourth color, marking materials respectively, to form a second composite color separation image; (f) transferring the second composite color separation image, in registration with the first composite color separation image, onto the intermediate transfer member; (g) similarly creating and developing, on a third tri-level xerographic module, a third tri-level image using a fifth color and a sixth color, marking materials respectively, to form a third composite color separation image; wherein the pair of first and second, third and fourth, and fifth and sixth, color marking materials are selected so that one such pair is cyan (C) and magenta (M) for improving registration of the desired final pictorial image; and (h) transferring the third composite color separation image in registration with the first and second composite color separation images, onto the intermediate transfer member to form a desired final pictorial image; and a substrate transfer station for transferring the desired final pictorial image onto a substrate for fusing.