The creatureoverlay.zip file you have requested: Tools / Creature Overlays (For Gimp) - 1.02mb is not available. Perhaps try browsing all files for the game Black & White 2 and upload any files you want to share or are missing. This is the only information we could locate:
This is a cool little pack my 1morerun that allows you to make your own skins pretty easily. You do need the Program GImp for it though.