I believe there is a way to do it with Adobe Imageready. I still have yet to unlock it's secerts however. If you have CS2 it should come with it, if not, I can do some reasearch for you and see what I come up with...
For making GIF's the best program is, again, Imageready.
~Leo
EDIT: Check the link here. However, I suggest reading the other two tutorials first before attempting to start this one. That should help you get started on converting AVI to GIF.
You fear oblivion. Yet you forget. The universe remembers every atom of your being. Even dust hums your name in the dark. Roleplay is dead. Long live Powertraders and PvP I guess.