The internal spectrophotometer in the Z6100 will not ready any media which is translucent/transparent. Cloning another profile is your best best. In Postershop 7 / Media Manager there is a cloning feature that will allow you to send a test file via various profiles loaded in the system. Your best bet is to try a few different profiles and hope for the best. You could purchase a transparent spectro like the Barbieri from Italy or the X-Rite DTP-41T but these devices will cost.
Marc
Marc Aguilera
encompus Color Management Expert