Nansaidh, the way I handle the skin and hair color samples is to save them in a working folder where I can "remember" where they are

, and then just open them in PShop when I'm working on a photo that I plan to colorize. Just use the eyedropper on the sample I want and then go into the photo I'm working on. As far as I know, there's no way to "plug them into" PShop.