Satellite (Air-download) As said above its unlikely that you will be able to do it as you would have to point at the right satellite and the manufacturer would have uplinking the software to that same satellite, an air down load is used mainly with fixed dish systems as a way to upgrade the software, it is used by DishNetwork, DirecTV, and VoOM satellite services here in the US.
You may be best getting a receiver with the latest software then cloning it to all the others if needed.