I think this has been mentioned before, but I had trouble finding it in a search.

Is there a good test DVD for home theater systems? I got a new receiver for Christmas, and it certainly has more advanced surround sound features, but I want to make sure I set it up corectly. It's also a bit hard to use, and I wish there were a good resource to tell me how to set this thing up right. Sony manuals have not been my friend lately.

ps- is there such a thing as a flat subwoofer for home theaters?