hi all, new
1. Launch MW3
2. Launch HxD
3. Open RAM -> iw5mp.exe
4. Go to Find -> Replace
5. It should replace 158 autumn's.
6. Press CTRL + S to save.
7. Set the camo on any class you want, then change equipment in random one (e.g. semtex to frag)
8. Leave the game
9. Re-open MW3 and check if it saved.
10. You can repeat all steps with using 'winter' instead of 'marine' if you want to use winter camo.