When all else fails... read the instructions

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Step 1. Get an .dll "injector"
Step 2. Find the .dll with the "injector's" add file feature.
Step 3. Load up Call of Duty MW3
Step 4. Inject .dll
Step 5. After having Joined a live match, press F6 to end the game.
Press F6 when in the game.
"Steps:
1. Inject DLL (google an injector)
2. Join random match
3. Press F6
4. ???
5. Profit.
VAC Status: *Should* be safe (no hooking/editing), however this is unknown for sure.
You're free to redistribute this program as long as the credits remain intact. (Mainly created for the free weekend)
Credits to Nukem"