Instructions
Load the ̶0;Call of Duty: Modern Warfare 2̶1; game disc in your console and select ̶0;Multiplayer̶1; from the main menu.
Select ̶0;Online̶1; if you have a PS3 or ̶0;Xbox LIVE̶1; if you have an Xbox 360, and then click on the ̶0;Callsign & Killstreaks̶1; option.
Choose the ̶0;Title̶1; sub-menu from the menu that opens up and scroll through the list of ̶0;Modern Warfare 2̶1; banners. Select the banner that you want to make your own and click on it to enable it.