+ rep for awesome explanation. thanks.If you knew the exact address on the xbox servers you could just download it without any authorisation lol.
Address was something like download.xbox.com/titleID/96abdab318524620af38b985010f3391ca5b4dcf.xcp
Only around 20 got it before MS realised and fixed the security issue.
No one was sharing but I managed to get it from someone, we couldn't figure out how to extract it so we spread it
Someone cracked it and released a program which extracted it and allowed JTAG users to play
Then we gave you a retail copy two weeks early. Enjoy