usb on its own don't suport networking, the few google FAQ's i found all had a dongle box from a usb network kit. its easier doing a direct connection for a few simple file shares, but i think you need a paralell cable to do that.
USB network kits cost about £30, 2 NIC's and a crossover cable will cost about £20 -£25
its for a laptop so hauling around a crossover and an extra nic just isn't a real viable option and I can't just pop open peoples computers and say hey I need to put this in here to do what I need to do.
so what your saying is I need a special USB cable with a box that tells it to be a network cable?
search for an amercian computer site that has USB netowrk hardware, i am looking in canadian sites because it will be about half price but might take a little longer to get to you LOL concerding canadian dollers are worht about as much as sand so