I can link you to a pack of CFG Mod menus. they dont need a jailbreak. Just a USB.
Find the menu you want. Even if it has a PS3 File, just see if you can get the execute code (should look like " exec "../../../dev_usb000/modmenu.cfg" " )
Plug in your USB after youve copied your game data to it. (Plug it into the farthest slot on the right, go to Game Data utility, find WaW, triangle, copy to USB.)
Open the game save editor folder, launch the SECOND file, and find your game save folder.
Cppy paste the execute code into GPAD0_SP and save it.