I just received a 512 to replace a failing 508 and am getting used to all the new things. Under the "Dish On Demand" menu is the "TV Entertainment" option. I'd like more details about the cost of this options but can't find anything. Is every thing a "pay per view" item? Are some of the listings free? I don't want to accidently order something - will there be a prompt or will one have to enter a password (there is a password set on the receiver) so that there is no chance of accidentally ordering something?