Syntax for a Linux task, please. I am not familiar with the OS.

I have an Ubuntu distro from Jolicloud on my Netbook, and there is no way to add a network printer from the GUI. I’m scared of the CLI, especially if I have to have root to do the job, but maybe one of you can give me the line-by-line syntax to add a printer that is attached by USB to the NAS. I’d appreciate it very much.