My appologies if this is the stupidest question anyone has ever asked (just call me Mr. Green!), but am I able to temporarliy use the 7.1 7100 as a 5.1 receiver and if so, do I just not hook up the other two surrounds? I'm sure it's something that simple, I just wanted to make sure before I got too far deep into this. I am in the process of purchasing speakers and I hope to be able to save a few hundred bucks by purchasing the two rear mid surrounds a few months down the road... if possible. Thanks in advance for your help.

Mike