Larry,
You can color the artwork in Corel so that the printer will automatically understand that you want to print each color as a black film positive:
Window > Color Palettes > Pantone Solid Coated
Choose colors from this palette when coloring your artwork (Except Process Yellow, Magenta, Cyan & Black!), just be sure to use the same color across the design. For example, if you have several vector objects that will print orange, make sure you use the same Pantone Orange on all objects, otherwise the printer will assume you want two separate films, each a different kind of orange.
Here's a better example:
Notice how the three colors in the design are listed at the bottom?
Everything red in the design, including the gradients protruding outward, use Pantone Red 032 C.
Once you've done this, you can go to File > Print, and under the "Separations" tab, the Pantone colors will be listed at the bottom as optional separations you can print (in addition to the default CMYK seps that always appear.)
Check only the Pantone colors, and click Print. The printer will output each sep in black, without further input from you.
If you have further questions, don't hesitate to ask.
