m8 those are called as avatars!!
You can use a avatar upto 90*90 pix here.
there are many sites offering the avatars the best is
*www.avatarity.com/
*www.palace4all.de/avatarpage/index.php3
or if you want to load your own avatar you first need to upload it to a free image hosting sites like
*www.photobucket.com
*www.imageshack.us
then link it back to here. You can set the avatar link in your profile section.
*www.thinkdigit.com/forum/viewtopic.php?t=4506
..:: peace ::..
Jeba