I'm talking about system back ups, not game back ups.
Go to Settings<System Settings<Backup Utility<Back Up<Choose to back it up to your usb. Then you take the back up and upload it so somebody else can download it and go back to the same place, but instead of choosing back up, you chose restore, and then it will restore that person's back up that you downloaded, and then you will have the modded game data from that person's back up.
We need to find where in there is your ps3 console id that its signed to. And then resign it to somebody else's ps3 console id and see if they're able to restore their ps3 with the back up.