OK, I assume you have a networkable printer. (One that has Ethernet at the back.) In this case, fire up Printer Setup Utility (located in /Applications/Utilities), and you will see all the printers via Bonjour. Then click "add", and follow the instructions for adding a printer.
Try to find a driver. If you cannot, you should get out a CD that came with Epson, and install software. This software will add the driver that you need, so then fire up Printer Setup Utility again, and then install the printer, and it should print with the right driver.
Hope this makes sense.
--Joe
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