Well do you have a usb or transfer cable. that is the first step. also there are some tuts already for this.

go to this site for a gamertag mod program: [ Register or Signin to view external links. ]

its the easiest thing in the world msg me on aim if u want help aim is dAng3Ls

Get a USB, take your account from your xbox onto your USB
Take the USB to your computer, use either Modio or Xport Xtaf (Modio is easier) to open your device (USB) Drag the account onto your desktop. Download EzGT Final. Put the account into EzGT and mod your name to what you want, take it back to modio, rehash and resign and then put it back on to your USB and take it to your xbox, and transfer it back to your xbox.

Hey thanks just private chat me my gtag is TTG Snoop thanks[/i]

just look on youtube its kinda hard

youtube and google are both your friends here

use the program editor and Hadzz GT USB XTAF XPLORER

very easy: programs you will need:
-Modio
-EzGt v2.2 (can get both from gameradar)
or google.ca
first you will need your usb/transfer cable
next from your Hdd move your profile (the one you want to mod)
to you usb or transfer cable

next you will open modio and hit the big (M)
hit explore my device
then hit file >open/close drive>Hit profiles/content>
then hit the profile 3 times till you get to the end right click and hit extract to desktop


now open ezgt 2.2 and hit open load your profile
mod it to what ever you want hit save

then back to modio close the dive you opened

and drag the modded profile onto modio rehash and resign about 5 times.
then hit save to device and load back to xbox sign out of your profile and onto modded
then go mw2/cod 4 go to xbox live hit xbl it will say pick nother account hit your profile then back to xbl and should be modded hope this helps