How to: Jailbreak iOS 4 Final Version on iPhone 3G and iPod Touch 2G Using Redsn0w 0.9.5b5-3

iPhone Dev Team has just updated Redsn0w to bring support for the Final Version of iOS 4 for iPhone 3G and iPod Touch 2G. This update works on both Mac and Windows and make you able to Enable Multitasking which is disabled by Apple. Follow the Steps below to Jailbreak iOS 4 Final Release on iPhone 3G and iPod Touch 2G.

Redsn0w beta has been updated to hacktivate iOS 4.0 for iPhone3G (in addition to jailbreaking the iPhone3G and iPod Touch 2G).
For now, the redsn0w beta release supports only the iPhone3G and iPod Touch 2G at today’s 4.0. It’s still a beta, so you’ll need to let Cydia reorganize, reload, and update after using redsn0w.

Steps:
Step 1: Download iOS 4 Final Version according to your Device from Here.
Step 2: Update your Device Firmware using the latest iOS 4 you have Downloaded via iTunes 9.2
Step 3: Download Redsn0w (Link at the end of Page) and Extract it, Then Open Redsn0w 0.9.5b5-3 and Browse it to the Original Firmware

Step 4: Select "Install Cydia" and choose the other features you need Including "Enable Multitasking" and "Enable homescreen wallpaper"

Step 5: Now turn off you Device and plug it to your Computer using USB Then Click Next

Step 6: In this Stage you will have to put your Device in DFU Mode by Following the instructions written in this stage
Step 7: Now, Let Redsn0w do the rest, Then your iPhone or iPod Touch will be restarted and it will be Jailbroken on iOS 4.

Now You will be Able to Unlock 05.13.04, 05.12.01 to 04.26.08 Basebands on iOS 4 Using Ultrasn0w 0.93 which was released today, Step by Step Guide posted here.

Download redsn0w 0.9.5b5-3 for Mac OS X
Download redsn0w 0.9.5b5-3 for Windows

Update 1: Redsn0w has been Updated to redsn0w 0.9.5b5-4
Download redsn0w 0.9.5b5-4 for Mac OS X
Download redsn0w 0.9.5b5-4 for Windows
Update 2: Redsn0w has been Updated to Redsn0w 0.9.5b5-5, same links above