QTR-Quadtone RIP

Looking over many inquiries written by posters, I'm inclined to think that I'm not the only one 
who feels that the QTR Manual is poorly written. For those of us who aren't and don't claim to 
be tech-centric, would be helped a bunch if someone, who understands the p's and q's of 
this "system", would kindly take the time to create a glossary of terms that would explain 
what it means when dragging and dropping files (.txt) and error messages pop up as such:
"Printer not defined" or "The Lab values are not in order. Cannot be linearized." If not, why 
not? And what does the user do to define the printer and put the Lab values in order? 
These are just a couple of examples in what I think are several gaps in information that 
would help many to make sense of the how's and why's of QTR.