Download Jailbreak PS3 4.00: http://j.gs/88964/jailbreak-ps3-400-link
How to Jailbreak 4.00 Firmware
1. Download Jailbreak-PS3-4.00.rar and awesome manager.pkg file to perform the Jailbreak PS3.
2. awesome file manager.pkg file is the file manager for the PS3 which manage files directly on the PS3.
3. Extract the file Jailbreak-PS3-4.00.rar and get PS3UPDAT.PUP.
4. Plug a USB stick into your computer and Create a folder in the root of the USB stick called PS3.
5. Create a folder inside the PS3 folder called UPDATE.
6. Move PS3UPDAT.PUP to the directory UPDATE which you just created on the USB stick.
7. Plug-in the USB stick into your PS3 and Navigate to Settings Tab System Update.
8. Choose Update via Storage Media.
9. It will say it found Version 4.00.
10. Choose OK.
11. Accept Conditions and Install Update.
12. After less than a minute, your PS3 will update, beep 4 times then shut down.
13. Power up your PS3 (You will have to do it on the console and not by the controller.
14. Your PS3 is now jailbroken on 4.00 Firmware.Enjoy.