Two Satellite Sky+ boxes in same room?

I'm wanting to use two sky+ boxes in the same room to be able to record upto four channels. One of the boxes will have my viewing card installed so I can record pay channels the other will be without a card and will be used for just recording free TV (ITV, Channel 4, etc). Does any body know which boxes use different remotes, if I get two boxes the same then they will both operate at the same time from one remote! The box I have at the moment is a PACE Sky+ digibox. I understand that I will require a quad LNB to run two units.