Currently, I have 4 rooms (receivers) with a mix of D10/D20 receivers.

I would like to know if it is possible to upgrade my Directv to hdtv for just one hdtv display - keeping the remaining three televisions as they are (analog)?

Or, would all tvs have to become digital for such an upgrade from Directv?

I know I would need to have a 5 lnb dish replace the one I currently have, along with a new multiplexer/switch - at the very least.

Thanks for any advice.