choose the pic you want to use... think it has to be kinda small... store the URL address (found in properties when you right click the mouse) by highlighting and selecting copy on the next right click.. drag it to your profile at PC ..

in your profile... go to edit personal preferences... scroll down to where it says avatar... copy and paste the "http" address (i.e. http//google/images.com/kittens) into the URL box.. then scroll down and click submit...

takes a few tries sometimes before people get it... good luck