I have tv's mounted on walls with all cables hidden behind the plasterboard running to a central point in a cabinet in the middle of the house, where I had my Sky boxes. I could change the channels remotely using a magic eye or IR device. I want to get UPC but was told by a UPC technician that I cannot switch the channels unless the box is located beside the TV.'s Does anyone know of any way I can overcome this, other than using a signal sender as I want to put 2 UPC boxes beside each other in the cabinet.