I have the typical setup VCR/RECEIVER/SATTV/TV/CD

What I want to know is

1. Sometimes I want to watch TV with surround sound from my reciever and most of the time I want to use the TV speakers Can I have 2 setups?

2. I have a Bell ExpressVU satellite system Can I control the SAT Receiver from the Harmony as if I was using the SAT's orig. Remote? e.g., How do I get the Guide on screen?

3. Where is the best place to buy one in Canada?

Thanks