QTR-Quadtone RIP

I had my Quadtone RIP / Piezography K7 setup working a while back, but have since 
upgraded my Mac to Leopard (now at 10.5.5), and Quadtone RIP quit working.  So I upgraded 
that to v. 2.6.2, and did the new printer install with the included script.  The printer shows 
up in the System Preferences/Print & Fax window.  However, using Photoshop CS3, when I try 
to select the printer in the print dialogue, I can't as it's grayed out, visible but unavailable.  
This holds true with all my apps.  It seems to have installed as a CUPS printer rather than 
using the Epson driver...?  Any ideas?