QUOTE (Dude @ Oct 14 2010, 01:26 PM)

QUOTE (Alriightyman @ Oct 14 2010, 12:23 PM)

Since this is public now, I might as well ask here. Do you need to have a JTAG 360 if you edit the OFFICIAL release that was bought from XBL?
Going off of precedent alone, I'd say the only time you'd need a JTAG is if you're going to edit the executable itself, if this game is anything like '06, that'll be the only protected file.
In the case of every XBLA game, or DLC, or GOD (game on demand) contents are container files that contains the actual game data.
So the awnser is yes. Yes, you need a jtag, because every LIVE or PIRS or CON containers are RSA signed, and the key is based on the Xbox 360's private key plus the MD5 hash of parts of the file. Therefore, if you change a single byte in the game, consequently the container file will have a brand new MD5 hash, and the RSA key will not match with the new MD5 hash of the hacked file, and it won't even show on the non jtagged 360 (well, in fact it will show for a fraction of second, but it'll suddenly disappear). If you are going to hack the game, you'll need to repack the game into a container in order to play it as a full version. It is then signed with a devkit private key (that is known), and requires a jtagged system because it bypasses RSA check, and can run unsigned code.
If you have a jtag, you can unpack the game and run it through the default.xex executable, though the game will show up as trial, because the "ownership" information is read from the container file that the game was supposed to be stored at.
So, in short, the only time a jtag wouldn't be required is if you, for some reason, knew the Xbox 360's private key. And if such a key was avaiable on the internet, the jtag hack wouldn't be needed at all anymore.
Really? I remember editing a GH3 ISO to enable autobot and it worked on my non JTAG'd 360. I haven't used it online and I'm not banned. :s