Neeaj,
This is a great question and one that comes up over and over again. I am afraid the only way to solve this challenge is with a "routed" IR system. Therefore, the IR commands going from the user must be routed to only the Sky box you are currently using and NOT to all of them or they will all respond which is very undesirable behaviour. If you are using the 8x8 matrix inconjunction with our Forté A-BUS system then you do not need to worry as this provides a routed IR intrastructure but limited 4 sources (which is normally enough). Alternatively our HAI control platform has addressable IR ports on the Home Theatre Extender so you can route the right IR command to the right device. Philips Pronto with an IR extender will also provide the routed IR function.
Jason Aldous
Aldous Systems