And, If you so desire, you can get a Xantech RT-8 IR router and setup all your changers on the same codeset then just send the RT-8 a command to tell it which changer to route the IR to. I used to use 2 RF extenders like Lowpro. Since I bought my RT-8, I've been able to consolidate down to a single set of DVD device pages in my TSU7000 and just have buttons at the top of the page to control the Zector HDS-4 input switch and the Xantech RT-8 IR routing.