Digital BW, The Print

I have decided to bite the bullet and switch over from OS9 to
OSX on my Mac G4.  (I'm already really glad - the computer wakes
from "sleep" much faster, and will now actually go to sleep, which
it had been unable to do since I added an Orange Micro 5-USB port
PCI card awhile back; plus, it's a LOT less flaky, in
terms of freezing up and such).

Anyhow, this also means switching from OPM/IJC to Quadtone RIP.
I've installed gimp-print and ghostscript and QTR, I think.  And I
did the "ADD" procedure under "Print Center".  So what's next ?
When I run the "Print" command under Photoshop 6, I still just
get the Epson driver (I think).   I cannot figure out how to get
to the QTR driver.  Am I confused, and QTR is stand-alone ?  Or
do I have to fire up gimp-print ?  Or do I need an OSX-native
version of Photoshop (PS 6 is running under Classic) ?

Sorry to be a dumb-ass, John