Here's my situation. I'm in an apartment with no wired internet available at my printer. I've had some issues connecting to it via USB, so I'd like to use the Ethernet feature for a more robust connection. My desktop is connected to the building's wireless and sits next to my printer. It obviously has an open Ethernet port.

Is there any way I can directly connect to my Smoothieboard? Tools I have at my disposal are an old and unused but working router, a plethora of Ethernet cables, a crossover cable, and willpower.