1. Go to the Xbox Live Marketplace on your Xbox 360.
2. Select "Games" from the main menu.
3. Select "Add-ons."
4. Select "Gamer Pictures."
5. Search for "Family Guy."
6. Select "Family Guy" from the search results.
7. Select "Download" to download the gamer pictures to your Xbox 360.
8. Once the download is complete, you can select the Family Guy gamer picture from your profile to use it as your Xbox Live gamer picture.