What file AIM ICONS are? I mean like gif or.jpg? How should I guide my visitors to install them? If like most AIM sites, how do they make the click and automatically installed as your AIM Icon? I do not use this program but I plan to make AIM ICONS for my visitors.. any tips?

How about wallpapers?

AIM icons are .gifs, usually 50x50 pixels. I have icons on my site, and I wrote the instructions on how to install them. (Since I havent figured out the other way to do it)