Axiom Home Page Forums General Discussion Home Theater 7.1 vs 5.1 install

Now, I have speaker wire ran to every imaginable place. So thats not a problem. What is a problem is my understanding of 5.1 vs 7.1. So here are some questions -

1. How many movies are now in 7.1? How do you identify those?

2. If I have a 7.1 setup (with the suggested two mon speakers, center back) how will 5.1 sound? Will the receiver up-convert to 7.1?

3. Does it make sense to run Front R&L, Side R&L, Rear R&L and Rear Center, since I will have some movies in 5.1 and some in 7.1?

Also, how does HD and television sound come through? Say you are watching the superbowl which is in HD....is that 5.1? In a 7.1 setup, how does the sound change? how does the sound get re-routed to the other speakers (or does it?)?

Thanks!