Originally Posted by
Havok.
Easier way of obtaining hidden camos
This is better way, since you unlock the camo on all classes.
1. Launch MW3
2. Launch HxD
3. Open RAM -> iw5mp.exe
4. Go to Find -> Replace
5.
6. It should replace 156 autumn's.
7. Press CTRL + S to save.
8. Set the camo on any class you want, then change equipment in random one (e.g. semtex to frag)
9. Leave the game
10. Re-open MW3 and check if it saved.
11. You can repeat all steps with using 'winter' instead of 'marine' if you want to use winter camo.