How to Jailbreak PS3 on v3.55 Firmware super easy in under 20 minutes using only a USB drive!!!
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1. Plug a USB stick into your computer
2. Create a folder in the root of the USB stick called PS3
3. Create a folder inside the PS3 folder called UPDATE
4. Download
5. Unzip Jailbreak.zip to PS3UPDAT.PUP
6. Move PS3UPDAT.PUP to the directory UPDATE that you just created on the USB stick
7. Plug the USB stick into your PS3
8. Navigate to Settings Tab
9. Choose System Update
10. Choose Update via Storage Media
11. It will say it found Version 3.55-jb
12. Choose OK
13. Accept Conditions and Install Update
14. After less than a minute, your PS3 will update, beep 4 times then shut down.
15. Power up your PS3 (You will have to do it on the console and not by the controller)
16. Your PS3 is now jailbroken!

How to Install Custom Packages on PS3 v3.55 Firmware:

1. Plug your USB stick into your computer
2. Drop into the root of the USB stick
3. Plug your USB stick into your PS3
4. Navigate to the Game Tab
5. Choose Install Package Files
6. Select the test.pkg
7. After it installs you will find the test package from geohot installed below the Install Package Files folder
8. Wait for more packages to be created by the PS3 community

BOOM! your welcome =]
-TheOne