I would think you could go into the manual speaker set up and tell it you don't have a 7.2 configuration. Then you have the option of Bi-amping to get the most from the rear surround speakers. I haven't tried this since I only have a 4.1 configuration at this time. Not clean, but it should work. There is not a lot of 7.1 content yet, and I still use the remote's "music" button to tell the V867 I have 7.1 for personal tastes even in a 4.1 physical world. Sounds good to me. For movies I lose the DSP and go pure direct. I love those white buttons, but they can't change your physical configuration.
Or you could just switch the wires. [joke]