Grab yourself a router, some extra ethernet cable with the little rj45 plugs and then hook it all up. plug your modem into the uplink port. and your desktop into port one and then the mame system in port2, if you have a cable modem, set your router to automatically detect all settings and then go through the power/cycle sequence. which is, (and it has to be done in THIS order) shut down the computer(s) unplug the power cord for the modem, from the back of the modem or the wall, then, unplug the power for the router, leave everything else connected. connect modem first, wait for the cable/sync light to go on solid. if you have a motorola surfboard modem, wait for the top4 lights to turn solid. once your modem is syncronized with your ISP, plug the router back in, wait for the router to show that its ready then turn your computer(s) back on. Once they're ready,set up some shared folders and password protect them so people off the internet can't get at them. then you can freely toss files from one comp to another. or you could set up a work group if you just want it from one comp to another.