QTR-Quadtone RIP

Hi,

I've been using the QTR for the last year or so on an Epson 7600 with Hahnemuhle Photo Rag 
308 with great success in matching some Agfa Portriga-Rapid prints made in 1981. In 
addition to the Epson 7600, I now have an Epson 7800 with the photo black and want to use 
the Museo Silver Rag, but am having difficulty understanding the paper choices in the curves 
section of the QTR print window. I only see "Ucmk" choices. Am I correct in assuming that 
this means Ultra Chrome Matte Black? And if that's the case, how do I select for the Silver Rag 
paper using Photo Black. I've looked in the Profiles folder in the installer and all I see are 
UCmk profiles. I am selecting QTR-Gray Photo Paper as my printer profile. My image is an 
Untagged Gray profile. I purchased the  QTRIP2.5 and installed it according to the 
instructions. The 7600 is used for matte papers only and the 7800 is used for Luster and 
Glossy papers only, so I am not switching out inks.

Is it possible to print using an Epson 7800 with photo black on Silver Rag with the Quad Tone 
Rip, and if it is, what do I need to do that I am missing? 

Wendy Young