The iPhone Dev-Team just released redsn0w 0.9.6 RC12 for Windows and redsn0w 0.9.6 RC12 for Mac. In redsn0w 0.9.6 RC12, Dev-Team put boot animations. They previously released redsn0w 0.9.6 RC11, but still there are some issues with boot animation on some devices, so they released a fixed version, which is redsn0w 0.9.6 RC12
Here is the official blog post by Dev-team.
Those running redsn0w may have noticed we enabled too many Settings options in some versions of the jailbreak (for instance, what you want your side switch to do, even if you have no side switch because you‚Äôre not using an iPad). Release rc10 of redsn0w corrects that (you can just run it over your existing jailbreak‚Ä¶be sure to de-select Cydia to avoid package conflicts).
Along the way, we‚Äôve also added the option to enable boot animations‚Ä¶these animations can be installed via Cydia, but be sure to select which animation to use via the Settings->Bootlogo setting after you‚Äôve downloaded an animation (and again, you can just run rc10 rc12 over your existing jailbreak‚Ä¶be sure to de-select Cydia to avoid package conflicts).
(The boot animation we tested against was ‚ÄúAndroid Boot Logo‚Äù. It correctly installs all the dependencies needed to run the animation at each boot).
So, if you want to “Allow boot animation” in redsn0w, but you already have jailbreak your iDevice, make sure that you de-select “Install Cydia” option on redsn0w, select “Allow boot animation” option, then re-jailbreak your iDevice.
Download redsn0w 0.9.6 RC12 for Windows by clicking the link below: