If you are a premium member, go here:
https://everquest.allakhazam.com/db/user.html there should be a link ont he bottom right hand side labled "Your files" There, you can upload a total of 5 images up to 100x100x pixles, in Jpeg or Gif format. Once you have them uploaded, return to
https://everquest.allakhazam.com/db/user.html and you should have a drop down selection box with your file names. pick one, and it will automatically update on all your posts.
but you have to be a premium member to use that.