USB save editing kind of

Okay so I’m on ps3 last time I went for the pimp and hawk I didn’t get desirable results so I want to start putting savea into a USB stick so I can farm for them whenever I want how would one go about doing that?

On the 360 at least you could just browse the console’s data and copy/paste the game’s files on a connected usb stick, I suppose the process on the ps3 should be almost the same: link