Hello Margaret,
You can use Photobucket to add an image to this site. I don't know how to do it but I'm sure if you start a new thread asking for help someone will assist you.
http://www.familytreeforum.com/profi...?do=editavatar
However this is useful for something like your avatar and you already have a cat as an avatar so you have done something similar already.
If you want to add an image or a document to your message then click on Advance and use the "Manage Attachments" button. It accepts most types of files.
Bye
Paul