Thanks, Travis.
What I am hearing (from outside this forum as well) is that HP has not made their printers and/or drivers compatible with Mac, especially OS X.
So, with your Epson 7600, you are using a less frequently used computer as the print server, and you are printing non-ps. Does that mean that you don't need RIP software? If you do have RIP software, could you please tell me which one you are using?
And how many computers are printing to the Epson 7600 (through the print server)? How are they connected? Is there a router? a wireless connection?
Many thanks for your advice.