if you want the hd you might as well tell them to put the hd box in your bedroom and leave the other box where it is

the instalation should cover the resiting of the original box if you get the multiroom subscription but i don't think there is a way around this really

you also need to get the cards paired to the boxes and he main card needs to be the one used most with the second card the one that'll probably end up being hte one in the bedroom

assuming you got the multiroom sub

it's £20 a month on top of what you are paying now for HD and mulitroom subs so think about it