Hi:
to set up a printer, which is not shown during the setup procedure in:
http://localhost:631is not easy. Please see my recent post (Samsung SCX-4521F)
First: Which cups are you using? (cups.tcz or cups1311.tcz) see ownership problems in my posts!
Second: Do you see your printer model during the add printer procedure? If not - did you find a PPD file for your model?
Third: Epson printers are well supported in Linux - did you "on boot": gutenprint.tcz, ghostscript.tcz and ghostscript_common.tcz ?
Fourth: Check wherther your PPD file needs foomatic-rip or not