i use this patch ever day and it never did anything wrong here is the description
description : 1) Create a folder on your JTAG and call it something like "MW2 TU7 XP"
2) Install MW2 in here to ensure it is a perfect copy.
3) Extract the file you downloaded onto a USB
4) Plug USB into JTAG.
5) Place "TU_10LC20N_0000018000000.00000000001OA" into your cache folder.
6) Place all the other files into your MW2 game which you installed earlier.
7) Press the Right Analog Button, and click A on "default_mp_launcher.xex"
HOW TO INFECT
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1) Go to system link, dont change any settings, then start the game. MAKE SURE YOU DO NOT TOUCH THE BACK BUTTON.
2) Connect to Retail via Ethernet Cable.
3)On retail, go to System Link and join your JTAG's game.
4) Once your retail has connected, switch back over to your JTAG and press the back button. You will see colorful writing on your screen for a split second.
5) When it says you are infected, leave the game on your retail.
6) On your retail, connect to Xbox Live. Go to Private Match, and invite between 5-11 friends.
7) Start the game, and it will end within 5 seconds of the countdown finishing.
The game will throw you into a public, 18-man FFA. DO NOT INVITE ANYBODY YET.
9) Wait for the game to start, then kill yourself for XP!
COMMON PROBLEMS
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Black Screen - reinstall mw2 like i said. 99% of time it is caused by some other mod you have in the folder.
Gametype not FFA - All my solutions seemed to fail, so all i can say is keep trying, could take up to 5 times :/
If this doesnt work, try again. I had to try more than once.
Only JTAG
DOWNLOAD LINK:
http://www.thetechgame.com/Downloads.htmlthis is the only place i could find it