Hi derwalroszsagt. I had problems setting up my local USB printer in Knoppix 6.0.1, but then I found that you can access the CUPS interface using http://localhost:631 (See http://www.cups.org/articles.php?L274 )

To get the correct PPD file, I used the Synaptic Package Manager to install cups-driver-gutenprint (Printer drivers for CUPS)

This worked for my Epson DX5000 on a Toshiba Satellite laptop USB port.

I appreciate you are trying to configure a network printer, but the CUPS interface should also cover this.

Hope this is some help.