If for example then I do what Graceland has does that require 2 cards ?

There is no point having HD downstairs as there isn't even a HD tv in the living room, however there still needs to be Sky down there for when my mum comes home and she wants to sit and watch tv.

I only want HD in my sitting room upstairs as this is where I spend most of time without messing up the living room with mates coming over and things like that.