Things You'll Need
Instructions
Plug the USB flash drive in your Xbox 360's USB port.
Turn on the Xbox, go to "Xbox," select "Memory," select "Hard Drive," select "Games," and choose "Call of Duty: Modern Warfare 3." Select the mpdata file, and move it to the USB flash drive.
Disconnect the USB flash drive from the console, and plug it into a USB port on your computer.
Launch the Web browser and navigate to RapidShare to download the Xplorer360 tool. You must use it to view the Xbox data on your USB flash drive.
Click on the green "Download" button and save the file on your computer.
Double-click on the "USB_Xplorer_360.exe" file you just downloaded to start the Xplorer software.
Expand the "File" menu, and click "Open." The tool automatically opens the USB flash drive.
Select the mpdata file, and click on the "Extract" button. Select to extract the file on your desktop.
Start the MPData Editor tool.
Go to the "File" menu, and click "Open." Use the resulting file browser to select the mpdata file, and click "Save." The file is opened in MPData Editor.
Click on the small arrowheads in the "Weapon," "Attachment," "Camo," "Equipment," "Special" and "Perk" sections to change your weapons, equipment and abilities.
Type the amount of XP you want to have in the "XP" box, the number of headshots in the "Headshots" box and the number of wins in the "Wins" box.
Go to the "File" menu, and select "Save." Your old mpdata file is overwritten. Close the MPData Editor.
Select the mpdata file in Xplorer360, and click on the "Delete" button to delete it.
Click on the "Inject" button in the Xplorer360 window, and use the resulting file browser to navigate to your desktop.
Select the mpdata file from the desktop and click "Open" to copy the file to the USB flash drive.
Connect the USB flash drive to the Xbox 360 console and copy the new mpdata file over the old one, overwriting it.