i had so much trouble following that post but let me try to help anyways, if i fail to do so sorry to waste your time. let me first post some pics of what USB/Ethernet looks like:
this is a USB plug (disregard the black part, thats a flash drive for storing files, just replace a cord where that parts at)
and this is an ethernet cord
this is the USB adapter for the Wii, the USB end plugs directly into the Wii.
take your ethernet cord (sold seperately) and plug it into your LAN adapter, the port shown in the picture. then from there, you need to plug it into your router, the computer doesnt need to be hooked up to the internet for your wii to work. the router just simply needs to be connected to the 'net through a cable wire, the one that screws into your modem, it will go into the wall, or through the floor to the basement, like mine does. from there the wii should recognize that it's hooked up to the internet and it should be self explanitory from there.
if you are still having issues, type in your error code in google and it should help.
good luck, if this isnt what you were looking for i am sorry, hope i helped at least a little.