First off you make a folder called PS3 on your USB.
Next up you go into that folder and make a new folder called UPGRADE.
Next up put one of these files into the folder :
And when you're done with that, let's go onto the PS3.
Plug your USB in your ps3, and wait for it to be done loading it.
When its done go to Settings then to System Update then Update Via Storage Media.
Let it load.
At the end it will ask for you to "Turn off ps3 after upgrade?". Do NOT check it.
When it's done it will beep 4-7 times.
And poof, its jailbroken.
