Things You'll Need
Instructions
Turn on your Xbox 360 console. Sign-in with the Gamertag you will use to buy the map pack.
Navigate to the "Game Marketplace" menu.
Select "Explore Game Content."
Select "Titles A - Z" and select "M." Select "Modern Warfare 2" from the alphabetical list.
Select "Extras" and choose "Stimulus Package" from the list provided.
Select "Add Points" to add Microsoft Points to your account, if you do not already have them. Enter your credit card information in the fields provided and purchase 1,200 Microsoft Points.
Select "Confirm Download." The "Stimulus Package" will be downloaded and installed to your hard drive. You will now have the option of selecting and playing on the "Crash" map during multiplayer "MW2" matches.