Without the number 09-f9-11-02-9d-74-e3-5b-d8-41-56-c5-63-56-88-c0 (in hex) or 13256278887989457651018865901401704640 (in decimal) you can't watch any HD-DVD. But with this number, you can read them into your computer. But the industry don't want this. You only should buy. Buy! But you are not allowed to use HD-DVDs like you want. This sucks.