These are boot logos for the MarioBrOS theme package!! You must have Green Pois0n's boot logo tweak for this to work! To activate them use the BootLogo settings under your Stock Settings app.
Two BootLogos are included:
Silver Apple and Retro Apple - take a look at the ScreenShots to see the difference.
Thanks go to miroppb for most of the images in Silver apple. I edited, streamlined it, added frames, and took out the glitches.