Instructions
Insert the game disc into the Xbox 360&'s disc drive.
Press the Guide Button on your Xbox 360 controller (the round, central button with the X on it) and select "Xbox Dashboard."
In the "Xbox Dashboard," move to the "My Xbox" category. The game in the disc drive will be the first window in the category. Press the yellow "Y" button to access the game details.
Select "Install Game" from the game details window by highlighting it and pressing the green "A" button. The game will begin installation and a "Percentage Complete" bar will track the installation&'s progress.