If you dont have a JB you need to use CFG on MW2... basicly download a MW2 CFG Menu to your USB and wait for someone to give you the infectionn...
If you dont want to download one off the web you can make your own one =)
If you can“t code, you can use my code finder and my CFG Maker here :
CFG Maker:
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Code Finder :
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Just use them together and you can make a nice CFG Menu =)