A good workaround might be to try outputting an original on ProLab's printer and then color-copying from that master at Kinkos onto card stock. Lastly, manipulate the images in Photoshop, but then do the card layout in Adobe Illustrator. I don't think Kinkos' machines have Illustrator, so one would probably have to save the file as some sort of postscript file. I'm note sure if this would work. While doing our card, I came to a realization.
Digital photography is great, but printing digitized images is a whole different ball game.
I now realize these cameras must be next to useless if you are planning on printing a decent quality print. I had heard this many times, but now I guess I really understand it.