1-First download Quickpwn Rc3

iphone-hacks.com/downloads/file/138

2-You also will need 2.0.2 ipsw google it.
Start the Jailbreak process and when the screen turns into White color (Recovery mode) unplug the USB and close Quickpwn RC3, now reconnect iPhone and iTunes 8.2 will discover the iPhone in reovery mode and the screen is still White color ...then Shift+RESTORE 2.2.1 or 2.2