http://fluffyasacat.blogspot.com/2006/08/how-to-make-animated-gifs-with.html Well here's a wagging-the-tail animated gif tute. Same principles. Hope it helps.

" Try and be nice to people, avoid eating fat, read a good book every now and then, get some walking in, and try and live together in peace and harmony with people of all creeds and nations."
-Monty Python