ok first off
<I am not liable for any problems encountered by following this tutorial>

It isn't as bad as the disclaimer makes it sound, you most likely wont get banned or anything if you keep the name appropriate.
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First you will need these items:
Modio: [ Register or Signin to view external links. ]

EzGT 2.1: [ Register or Signin to view external links. ]

WinRaR: [ Register or Signin to view external links. ]

USBXTAFGUI: [ Register or Signin to view external links. ]
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Ok start at the xbox...

1) Plug in your Flash Drive(make sure it is configured to your xbox it will notify you if it isn't)

2) Go to System Settings> Memory> Gamer Profiles> profile you are modding

3) Move the profile you are wishing to mod into your memory unit(USB)

4) Remove USB from Xbox and Connect it to your Computer

5) Open the USB using USBXTAFGUI

5a) Click on Data Partition
5b) Click content and keep clicking until a file named something like "E000000..." or something like that.
5c) Extract the "E00..." file to your Desktop.

6)open EzGt 2.1

6a)click on the button in the top left corner and open the "E00..." file(your gamertag should show up in the application)
6b) Delete the gamertag in the box and put whatever you want in there.
6bb) be mature people, don't make your tag F*** or some other form of profanity, Also refrain from derogatory remarks... this will keep you less suspicious meaning you wont get penalized.
6c) Save modded name to desktop it should be another "E00..." but will be a folder instead.

7) Open Modio

7a) drag the modded file into Modio(Be sure to open the file all the way until you find the "E00..."
7b) click rehash and resign and your good to go

8) open up USBXTAFGUI again and go to the content tab... no further

9)drag the modded "E00..." folder into the content tab

10) plug your USB into your xbox and go to memory and move over both accounts

11)you now have a modded account

12) To play online with it sign onto the modded name go into a game click play xbox live it should bring up your profiles now choose your original account and have fun

13) do not customize your avatar... when the screen comes up just hit the menu button and go on...

if you have any questions PM on TTG, or message me on Xbox my GT is xDaDomeShotSx

thanks rep and like if this helped ")