QTR-Quadtone RIP

Hi.  

I'm really confused about a particular point (well, in fact I'm 
confused about a load of things relating to QTR, profiles, Dmax, L*, 
etc etc etc - but this is the first question on my list!!!).  
Grateful for any help!

I have been playing around with QTR on Windows and my Epson 2200 for 
a few weeks.  I use CS2 and ConvertToB&WPro V3 for image 
manipulation (usually limited to dodging & burning), Qimage (print 
to file) for final print interpolation and sharpening and 
the "canned" QTR EEH curves for final printing on EEH (usually 75% 
cool 25% warm works well for me).  

The print output file produced by Qimage does not have an embedded 
profile (when I open the file from CS2 it asks me if I want to 
assign a profile).  What should I do at this point – should I assign 
a profile before printing or not?  And if I do, which profile should 
I assign – Adobe RGB, Dot Gain 20%, or one of the QTR profiles?  Or 
does this not matter one iota to QTR?

I've tried to find the answer in the manuals and this forum but I'm 
hopelessly uneducated in this whole subject and totally overwhelmed 
by the jargon!

Thanks for any advice!

John Wood