No one has (so far) created an editor for the factory boot up animations. Only the custom logo (which appears AFTER the factory boot up animations) has been editable so far. I've been meaning to update my logo editor to do this, but have not gotten around to it.

I will say this, though:

Anyone who wishes to create such an editor, I have reason to believe that the necessary information is in the publicly-available kernel source code. For instance, the flash memory locations of the stored frames are in the kernel source code if I recall correctly.

So. Who's up for it?