I just added my CLP-315 to tomato, it was pretty straightforward once I figured out the settings. In Tomato: -make sure that under USB Support, "USB Printer Support" is checked -plug usb cable -turn on printer On Snow Leopard 10.6.4 -open System Preferences > Print & Fax -click the "+" sign on the bottom left hand side of left column -the "Add Printer" dialog pops up, choose: -- protocol "HP Jetdirect - Socket" -- Address (the LAN IP of your Tomato router) -- Queue (blank) -- Name ( whatever name you want) -- Location (anything; Mars or Uranus if you want) -- Print using - choose the driver for your printer -click "Add" The clp-315 already has a driver in snow leopard and there is a newer version in the Samsung's website. I am using the SL one. Next you should see it on your list. And that's it. Print a test page. It should work for other printers, just choose the right driver.