Directions for use:
Extract your save to the desktop
Open your save with my mod tool
The tool will display your current XP total
Simply type the amount of XP you wish to have (Max 2000000)
Or Hit The Max XP Button to max out your XP :P
Re-Hash and Re-Sign
Then inject the save onto your USB memory Stick or directly on to your Xbox 360 hard drive.
If you max the XP it will jump you to level 22 And you will have 22 upgrde points to spend
Enough to unlock all of your upgrades. ;)
You can not mod the full 23 levels as it seems to mess up the game if you do
I had to lower the max XP amount to 2000000 XP as this has been found to be the safest
modable max XP you can give yourself without affecting the game.