I have 4 receivers - two HR-20 -100, an HR-22-100, and a HR-21-100. Three of them are hard wired to the internet. One is in an upstairs room that I cannot hard wire. I would like to be able to watch movies on demand on that on - an HR20. I am on a SWiM 8 system. Should I buy a Cinema Connection Kit - or can I use one DECA just for that receiver? I do not have DECA's on any of the others.