connect the wireless router to the ethernet port on the cable modem... you don't need wires for the computers.
cable... mine's 600kb
no, no, no! i don't think they are actually allowed to touch your machine because if anything goes wrong with it (something's already wrong with it), ntl don't want the responsibility.
they'll check the signal is correct at the end of the cable and attach the modem. some of the engineers may hang around to make sure you can access the internet though.