QTR-Quadtone RIP

Hi,

I have been using QTR for about 3 years, with 2 different 4000's, with
all the usual learning pains and rewards.  I recently added a 3800 to
the mix.  QTR handles the 3800 just fine.  The trouble I am currently
having is that when I try to build a profile for the 3800 I get the
following error "Could not find PPD file for Quad3800\".  This is when
I try to compile the file for Harman FB I downloaded from the files
section of this group.  Quad3800 is indeed the name of my printer.  I
can build profiles for the 4000 just fine.  Where are the PPD files
located?  I found them once but have forgotten where I they are.   
Oh, I'm on a Mac using 2.5.2.  I would guess that the "\" might be
part of the problem but the "/" is not on the PRINTER= line of the
text file.  Anyway, thoughts and suggestions welcome.

Thanks,

DDeloof