Howdy! No, nowhere can you get 'all the skins' for download. That would hardly be practical, since no one knows exactly which one a person would be needing. Also, making variant skins requires less than making a new animal. You need to have more than just 'skins' to make an animal, you see.
I would suggest you go to our Downloads section and first of all download Sideshow Bob's tutorial, APE II. That will tell you what other programs are required to make an animal, and where to get them. It will also tell you where to find the .dds files (skins) for your animal.
If you want to make only a variant for an animal, you can download Penguinman's VAT (Variant Animal Tutorial), also in our Downloads section. Hope this all helps!:smile: