I am SO confused. I have been reading Digital Negatives, I have the Quadtone driver, I not sure how to use it with the 7800.(I haven't found the specific profile for this printer and medium) I want to print a transparent positive on Premium OHP for use with solarplates. What do I need and what do I not need? I do not need the control for Palladium, but I'd like to understand it. Thanks.