Digital BW, The Print

Ok here is my crazy idea.

Epson 2100/2200 using QTR - Am I right in saying that only 4 inks are 
used, Black, Light Black, Light Cyan, and Light Magenta. Yellow, 
Magenta and Cyan are not used. If this is this case it would easy to 
replace one of these with a gloss optimiser cart. I know MIS are 
producing a CFS for the Epson R800 and so gloss optimiser is 
available and so are empty carts for the 2100. Problem is how would 
you program QTR to use it ? Could it be done within the curve 
profiles? Am I going mad ?

Just a crazy thought.

Peter