Not trying to make light, but you didn't spend the $70 on a router just for this.. On broadband you should've had a router in the first place to protect your computer from the outside world. You computer should NEVER be connected directly to a broadband modem..
But basically yes, the New Releases are PPV, and the other up to 4,000 are things that are currently in rotation on the channels you subscribe to. Pretty much every channel now has an On Demand that is included FREE, even the premiums (most, if not all cable companies charge $5 per channel for premium On Demand!). You just add '1' in front of the channel number to access it from you (or, go into the guide and scroll from channel 1000) from your DVR. Once you initiate a download, it is visible on the MRV list and can be watched on any MRV receiver. As Ice said, it is great for getting to watch stuff you might've bumped from the DVR or forgot to record, especially if you're a series buff because those are usually on the VOD the morning after they air.