Things to know about your Xbox 360 JTAG stuff

Location to store your game
HDD:\Content\0000000000000000\(gameID)
Use xm360 to unlock your XBLA game or DLC if you can't play it

Location to store your DLC files
HDD:\Content\0000000000000000\(gameID)\00000002\

Location to store your Title Update file
HDD:\Content\0000000000000000\(gameID)\000B0000\

If your xbox360 keep crashing, then try clearing the Xbox 360 system cache:
 1. Press the Guide button on your controller, then go to Settings, and select System Settings.
 2. Select Storage or Memory.
 3. Highlight any storage device, and then after that press Y on your controller. ( It doesn't matter which storage device you selected)
 4. Select Clear System Cache.
 5. When prompted to confirm storage device maintenance, press Yes.
Clearing the Xbox 360 System Cache DOESN'T remove any file or game content!