What you will need:
Keyboard
Instructions:
What you do first is go to your settings on your Playstation. After you have done this go down to your accessory settings. Then you go to keyboard type and change the language to Dutch. After this you load up MW3 and go to your clan tag on multiplayer. This is when you plug your keyboard into your PS3. Now what you do on the keyboard is hold down the two Alt buttons next to the space bar.(Some computers are different than mine so one of the Alt buttons could be Alt Gr.) While your holding these two buttons press 4 for L3 and 5 for R3 you can do it up to 4 times. It will show up at 1/4 for L3 and 1/5 for R3. When you have done this press start on your controller and have an awesome clan tag. Have fun!!