I'm slightly confused how to use this. I have a gaming PC and a 1080p projector. I was always planning to just run an HDMI cable from the 4th output of my 2 cards into the AVR, and then get a second wireless keyboard or something to use when gaming at the couch, rather than a dedicated HTPC for gaming (I use an old macbook pro for ht, along with ps3/xbox360/appletv/googletv)