Instructions
Load the ̶0;Call of Duty: Modern Warfare 2̶1; game disc on your game console and press the ̶0;Start̶1; button to enter the main menu.
Select ̶0;Multiplayer̶1; from the main menu and then select ̶0;Options̶1; to configure B3 as your controller̵7;s button layout.
Click ̶0;Button Layout̶1; and scroll down to the bottom button layout. On screen it will say ̶0;Lefty̶1; (Lefty and B3 is the same thing). Click "Lefty" to select it as your button layout and then press the ̶0;Back̶1; button.
Select ̶0;Xbox LIVE̶1; (if you have an Xbox 360) or ̶0;Online̶1; (if you have a PS3) and then click ̶0;Private Match̶1; to begin hosting your game server.
Click ̶0;Game Setup̶1; to configure your match options, such as map, mode and rules. Click ̶0;Invite̶1; to invite players to your server, and then click ̶0;Start Game̶1; to begin hosting the match. Your ̶0;Call of Duty: Modern Warfare 2̶1; server match will now begin with B3 configured as your button layout.