HI, THIS MIGHT ALREADY HAVE BEEN COVERED BEFORE.... BUT WE HAVE SKY + dOWNSTAIRES, AND HD UPSTAIRES....HAVING JUST PURCHASED A NEW FULL HD TV DOWNSTAIRES, IMI'M JUST WONDERING IF ITSIT'S POSSIBLE TO JUST SWAP BOXES OVER, TO JUST TRY NEW TV ??? DOES IT MATTER WHICH CABLE GOES INTO WHICH SOCKET ON BACK OF BOX ?