Datacolor User to User Support Group.

I can't figure out how to add the extended grays to my existing profile.

I printed 729 Patches on three sheets and Extended Grays the 4th sheet.

I've measured and created a profile ("Staples Glossy Cone 1400.icm") 
and I've have a measurement file for the Grays ("Staples Glossy 1400 Grays.xml")  

How do I get to the next step of creating a profile INCLUDING the Grays?

I hope there is someone there to give me a clue as I'd love to get back to printing.

Thanks

   Steven