Terry, the "moving comics" are animated gif files. You can find gif and wav file sites by using google. There is also an iHub board dedicated to gifs, and has links to many sites. That is #board-1078.
To post gifs, this board gives the basics: #board-1277. Although intended for posting charts, charts are either gif or jpg files, so it works the same.
For experimenting with the process, and it takes a few tries to get it right, try this thread: #board-107. If you are having a problem, ask for help.
Of course, you can always look at the FAQ tab at the bottom of this page. That would take you to:
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