how do i get them both on DSL without running another ethernet cable down to that apt which is right below me.. how do i do this can i use a antenna or what and what kind of set up plz and thanksalso one more question plz, (if i have to get a advanced modem which with my company i will have to if i use a ethernet cable and run it down to the apt below, the advanced modem has multiple plug ins for more than computer)my point is is i have to do that can i just use a real long telephone cord to plug the computer downstairs to my modem or do i have to get a long ethernet cable and use that instead ? and where can i get a real super long ethernet cable cheap ?wireless router -- where do i get it at and how much is it plz and tyOK ONE MORE ?? PLEASE where can i get real cheap a real super long ethernet cable ??? thanks