QTR-Quadtone RIP

I'd hoped to hear by now from some of the experienced folks on here. For various reasons 
I'm not able to develop my own curves at this point, so was wondering where there is a 
collection of QTR curves for specific papers, notably the Red River natural, the Lexjet version 
of enhanced matte, and various Hanemuele art papers.

I'm also wondering why there is no "neutral" curve for the Epson papers included with the 
QTR download.  

Finally, I'd like to understand the differences between the Epson UC2 photo black and matte 
black inks.  I am running an Epson 4000.

I'll post this and hope again for input.  Thanks.

eric hatch