this is a tutorial how u can change your grapics on ps3.

1) copy your save data from your PS3 to a USB flash drive
2) put your USB in your PC
3) open your savedata till you come to the GPAD0_CM file
4) open your GPAD0_CM file in note pad
5) go to set gpad_buttonsConfig and change what is between the " " to "enable_art"
6) save it
7) put your USB back into your ps3
go to save data utility
9) go to your USB
10) go to the cod4 save game
11) press triangle and take copy