To make a moving avatar, you need a program that will convert a series of pictures into one file, called a "gif" file. I have a thread on how to make them.
http://www.yorkietalk.com/forums/yor...-avatar-2.html, but the program I know about is for PC's and for Mac, you need different software. See post 25. I'm told that GIMP will work with the Mac, and that you can use it to make gif files, but I'm not sure if this is true because no one that I've recommended it to has every gotten back to me. Here's the Gimp site:
GIMP - Free software downloads and reviews - CNET Download.com. Some people make their avatars at Blingee.com. You upload one picture, and it will add sparkles and other things to it. Photobucket may also allow you to group a series of pictures together, but I haven't checked that out either.