While jailbreaking, in case of Sn0wbreeze, make sure you enable the option “Enable Animated Logo Capability” found under Expert Mode->General, as shown in the screenshot below.
And in case of Redsn0w, “Allow boot animation” option as shown in the screenshot below.
Note: Those of you who are already jailbroken on iOS 4.3.1 can simply rerun the jailbreak using the updated version of the same respective tool (Redsn0w or Sn0wbreeze) which you initially used to jailbreak your iOS device.
Step 2: Once your iPhone, iPad or iPod touch has been jailbroken, start Cydia and install “Apple Boot Logo” (aka Animate), and you’re well on your way to some animated goodness.
Now you need some themes, which can be found by searching Cydia for ‘BootLogo’ and install whichever themes take your fancy.
Once all that is done it’s just a matter of firing up Settings.app and choosing which theme you want to use from the new BootLogo menu.
Here is a little video of it in action:
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