2:Make sure theater recording is enabeld in mw3 options menu
3: Select MULTIPLAYER from the main menu.
4: Select Xbox LIVE / Playstation®Network within the Multiplayer menu.
5: Select VAULT.
6: Select a video or replay from ONLINE VAULT, FRIEND’S ONLINE VAULT or THEATER.
7: Select PLAY.
Capturing a Screenshot
8: Use the SCREENSHOT command when you’ve found the perfect screenshot.
9: Select SAVE.
10: Select a TITLE, DESCRIPTION, and TAG, and then place the screenshot in a slot within your Vault.*
Uploading a Screenshot
11: Screenshots saved in your Online Vault are automatically uploaded and appear on your MW3 Playercard on ELITE where you have the option od downloading them. once downloaded you can easily upload to image shack or othter equal program