Instructions
Navigate to the "Windows Live" email account on the computer. Click "Get Account" and "Get it."
Enter a screen name that you wish to use and a secure password twice.
Enter a country/region, city and postal code. Choose one that you prefer and match the postal code to the city. Enter the CAPTCHA phrase and press "Finish."
Turn the Xbox 360 on. Select "Network," "Join XBox Live." Click "Continue" and select the game you wish to play. Click "Done" and "Yes."
Type the email address you just created in Steps 2 and 3 and click "Done." Enter the password for the email address and click "Done." Download what you need from the new region.