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1.Plug In your SD or USB to Your ps3.
2. Go To Save Data Utility
3. Find your cod 4 save data file.
4. copy that to your SD or USB
5. Disconnect the USB or SD Card.
6. Plug it in to your Computer or laptop
7. Go to My computer
8. then click Removable Disk (usually a letter here) (for me "G:")
9. Double Click "PS3"
10. Double Click Click "SAVEDATA"
11. Double Click "BLES00148-AUTO-"
12. Highlight "GPAD0_MP" With your mouse
13. Right Click it.
14. Open With
15. NotePad
16. Then Delete everything inside.
17. Then Copy and paste this code into it.
18. set playlist "7"
set clanName "^6"
set cg_drawShellshock "0"
set reload "1"
set melee "1"
set breath_sprint "1"
set cg_laserForceOn "1"
set player_sprintSpeedScale "5"
set jump_height "99"
set perk_bulletPenetrationMultiplier "80"
set player_meleeRange "1000"
set cg_drawHealth "1"
set fx_draw "1"
set cg_thirdPerson "1"
set player_sustainAmmo "1"
set ps3_voiceSpeakerGain "5.5"
set motd "Visit NextGenBoards"
set customclass1 "^4Assault"
set customclass2 "^6SMG"
set customclass3 "^5LMG"
set customclass4 "^3Shotgun"
set customclass5 "^2Sniper Rifle"
set scr_player_healthregentime "0.01"
set scr_player_sprinttime "99"
set player_sprintTime "99"
set perk_weapRateMultiplier "1"
set perk_weapReloadMultiplier "0.01"
set perk_weapSpreadMultiplier "0.1"
19. Plug it back into Your PS3
20. Overwrite This save You just made with your Previous Save inside Save Data Utility.

i did not find this i just did a more simpler easier tutorial.
Please rep me

Dont listen to those people that are like " Subscribe and ill give u the laser mod" Because its all here.

u have to delete the latest patch to do it, otherwise they won't work

delete patch 1:30 to work

It works., just need to do something simple first!
Just make sure you have the Game Data deleted (Not the save data) and make sure you get some Grado_CM codes aswell. That's the main reason his didnt work. CM must be edited first.