Jailbreak iOS 4.2.1: Greenpois0n RC5 Will Have a Boot Logo Animated

Tool iOS 4.2.1 jailbreak untethered Greenpois0n RC5 propose a long-awaited surprise. The Chronic Dev Team said it will be possible to modify the boot image of iDevice (Apple logo on black background) with a moving picture.
A video demonstration is available:


When Greenpois0n RC5 is available to the public, the starting time will be (obviously) shorter. In this demonstration, the iPhone verifies