if u download a update

Yes you can and if you do, you wont be able to go online with the game until you re-download the update.

You have to input this code in the memory on the system blade. Go to this website:

http://www.joystiq.com/2006/06/09/xbox-360-hdd-cache-clear-code-discovered/

lol iknow just need help

If the code on the first website I posted didn't work, follow these steps:

Clear the Cache on the Xbox 360

To clear the cache on the Xbox 360 do the following:

• Go to the Xbox Dashboard, select the System Blade, and select Memory.
• Highlight the HD symbol and press Y.
• Press X, X, Left Bumper, Right Bumper, X, X.

You will see a confirmation message to confirm system maintenance, proceed.