Copy your save data from your PS3 onto a USB or somthing that will hold the data, like in my case i used my phone.
Now plug it into your PC and open up the folder within your USB, PS3, SAVEDATA, BLES00148-AUTO- and then open up your GPAD0_CM folder in Word Pad or whatever youve got and copy over this code;
set gpad_buttonsConfig "createfx"
set gpad_button_lstick_deflect_max "1"
set gpad_button_rstick_deflect_max "1"
set r_gamma "1.1"
set snd_volume "0.9"
set input_invertPitch "0"
set input_viewSensitivity "2.6"
set input_autoAim "1"
set gpad_sticksConfig "thumbstick_default"
Save it and put it back in your PS3.
Now start up CoD4 find a game, get in a game and;
Pick a class
Turn of controller
Turn back on
Go in and out of options, go back into the game and your done!
Also you cant move up and down unless you go to button layout and pick tactial, but doing this disables the hack for the next game so your going to have re-copy your COD4save