Hi there I've got Sky Digital in my back room but I want to take the Digi box upstairs, can someone tell me how to extend the cable from the back room to another room? because the cable coming from the Dish has a screw on connector which goes at the back of the Digi box, how do I join another cable to that one?? and also what kind of cable do I need? is it the same as the aerial cable?? any advice will be welcome.