Shoutbox

The maximum size for a non-animated emoticon is 12x12 pixels.
The maximum size for an animated emoticon is 50x50 pixels.

So.. if you make an animation with two frames with the same image, it will be 'animated' but will not move.

You can do this with any animation program.

Edit: I was searching for a free animation program and finally I found a good one:

Animator-9 is great

Edit: No problem