This tool is easy to use, follow the steps and you will manage the easy parts.
1: Open MW3 MP or SP. (If SP, be sure to select MW3 Singleplayer in the Options.)
2: Be sure the game is FOUND.
3: Enter the address you want to edit. (Any address containing: 0x , &H will auto remove.)
4: Enter the value you want to set it to. (Check the HEX if you're going to enter an HEX value.)
5: Press Hack.
And you are done.
For the other Options in the tool:
Spam Value(s) - Allow you to "freeze" the value(s) entered.
For better known - It will start a timer with interval 1.
Clear Values - Clear all the values you have entered.
Show Address Value - Will show the value of the address you have entered.
Enable Multi - Allowe you to enter more then ONE value.
NB: Use a SPACE to seperate each value!
FF FF FF FF
10 10 10 10