Well I know that sometimes you can download Xbox 360 games from BitTorrent sites. I don’t think they work that well though. My point is, somehow that person had to get the data off the disk and put it on BitTorrent. I’m sure it’s very hard.
You might want to check out this
But first you’ll have to do hack your 360 firmware
Sounds like a lot of work but I hope this helps :)
Warning: it obviously voids the warranty