QTR-Quadtone RIP

Hello All, Is there a print size limit using QTR? I want to make a 24X72 in. print on a
Epson 9600 UC, I will first make a custom paper size, but a are there any other concerns?
I am working with Photoshop CS2, Mac OS X Tiger. I have have good results with this
system with smaller sizes. Any advise would be welcomed.  Thank you, Tom