You have to create a network bridge to get xbox live and media center both to work. Try googling it, its what I do with my laptop. If you can't find a tutorial how to do it after some searches I'll try to look for you.
Even if we get the key, thats only like the "hint" key. Then we can decode/decrypt with it. Its like National Treasure 2. We have to steal the key, then decode it.
Why care if he has made progress or not in Halo or not. He made a video that he thought was cool (it looked pretty cool) and wanted to share it. Why does everyone have to flame about any map modding video posted anywhere?
That example really doesn't prove to be helpful. But it can be very helpful whenever you need to do something atleast once, then repeat the action based on the results.