Network A Standalone Computer?
Remember, there was a standalone computer mentioned in the first post.. Depending on how far away the standalone computer is...and whether it has an ethernet card....and whether there is need to purchase a router....and other considerations, it might make the networking idea a little expensive or extensive to simply copy ONE FILE from one computer to another..
Still, your idea is a good one should more files and/or printers need to be shared.
Hope this helps.