Instructions
Open the DVD disc tray and insert the game you wish to copy. Close the DVD disc tray.
Navigate to the Xbox 360's dashboard by pressing the "Guide" button on the controller, pressing the "Y" button and confirming the action on the resulting prompt.
Scroll up or down to navigate to the first section of the My Xbox area. The first section displays the game's cover art and a few game details. From here, you would normally press "A" to run the game.
Press the "Y" button. This takes you to a new screen where you can view game details as well as install the game to the hard drive.
Select "Install to Hard Drive." A progress bar appears and the game begins installing to the console's hard drive. You cannot do anything with the console until the copying process completes.
Press the "A" button after the copying process completes.