Is it possible for Time Warner Cable to use a pre existing cable line which is going into my cable box to hook up a modem so I can have Internet? I've got a modem in another room but I don't want a cable running down my hallway for 30 feet. I've tried Ethernet bridges with limited success so that's pretty much out of the question. Is it possible? Do you know how much extra it is for an extra modem? Thanks in advance.