QTR-Quadtone RIP

I really should stay subbed to this group.  I come and go--and 
obviously miss things.  I always print from the QTR GUI---but see that 
others print from PS and Qimage.  Since I print color from both of 
these, I'm totally sure of my knowledge to print something other than a 
QTR file.  However---what I'm wondering is how is it possible to 
print 'toned' prints from either-- (using the blending which I've 
carefully done wedges for on my various papers)?  I understand that Roy 
created a profile to use with Qimage--but--when you use that, I'm 
assuming that you will be printing a neutral gray--am I right or 
totally offbase?  I'm perfectly happy printing the way I do at present 
but really want to be up to speed on the possibilities.

I've also been contemplating purchasing a 2400 to replace my 2200--
primarily for the mono printing, but I see that others are still using 
QTR for mono with the 2400--so that pretty much tells the tale for me 
on that.

Diane