http://gimp-print.sourceforge.net/MacOSX.php

Above is the URL for the Gutenprint site. If your Epson printer requires the Gutenprint driver to work with 10.6, it may well be better and easier to update to the latest stable branch version of Gutenprint rather than install the Apple Epson Printer Drivers monster on your hard drive.

The current stable branch version of Gutenprint is 5.2.4, which is one version past what is included with the Apple Epson Printer Drivers installer. It is 13.6 MB. Compare that to ~350 MB for the Apple package.

Just be sure your printer requires the Gutenprint driver by reviewing the Epson list at:

http://support.apple.com/kb/HT3669

Remember to AVOID the beta versions of Gutenprint, which could potentially hose your Mac. Stick to the stable branch ONLY. I've never had trouble with it.