You will need:
.1 USB Stick/Memory Unit(2.00gb+)(or what ever you want to call it )
.Horizon [ Register or Signin to view external links. ]



Tut:
1)Plug your USB int to yor XBOX and go to System Setting>Memory>USB>Configure.

2)Unplug it then plug it into your computer then open "Horizon."

3)Click: Tools>Gamer Pic Pack Creator>Search for a Game.

4)Now Search for a game that you like E.G. Family Guy (NOTE:NOT ALL GAMES WILL HAVE GAMER PICTURES AND NOT ALL GAMER PICTURES WILL COME UP.)

5)Select the picture that you want just by clicking on them. (NOTE:SOME PICTURES COME UP MORE THAN ONCE!)

6)Under the pictures you have selected there is a box that says "My Picture Pack" click that box and rename it to what you want E.G. Family Guy

7)Now at the top of there gamer picture pack creator is says "save" (a red box.) Now click it and save it to where you want.

8)Now close it down

YOU DON'T HAVE TO DO THIS BIT - SKIP TO 12) IF YOU WANT TO MISS THIS BIT

9)Now click on "Package Manager" and open up the gamer picture pack you just created then click "Contents" and click on a file that begins with "64_" then "right-click" it and then Extract it.

10)Go back to "Package Info" and to the right and under "contents" the is a circle with an X inside, right click it and click "replace" then find the extracted file from contents and open it.

11)Now save it

12)Then click "Devise Explorer" and then "gamer Pictures"

13)Right click and then "Inject File..." and search for your Gamer Picture Pack and open it.

14)Once it says that the package was transferred take out your USB and plug it into your XBOX

15)Now go to System Settings>Memory>Gamer Pictures>Your GP>Copy>Hard Drive

16)Now go to Profile>Edit Profile>Change Gamer Picture and find the picture you want and enjoy