he mission you want to mod on cod4. Once you find the mission go in and shoot your gun. Then go to your dashboard-system settings-memory and go to your games- call of duty 4- then campiagn then it should said ur gt somewhere around there. (make sure its the right campaign if u have more than 1 account)once you have found it put it on your usb. unplug you usb and insert it to your computer. open up usb explorer and find your profile and keep clicking until you get to savegame. extract your savgame to you desktop. After that you want to open up thecodtool, open your savegame in the codtool then set everything the way you want it then save. then open modio (it takes a while to open) drag your save game in and rehash and resign it and wait until it says dashboard. once that is done put it back on usb explorer , then go on your xbox and put it back on you hard drive. please insert your cod4 disk and then resume campaign!!! Please rate this post is the comments THANKS! if yo cant find the programs id be happy to help