Adding a picture is so very easy.
First of all you must have the picture you want to use in your computer. If you already have one in your computer and know where it is continue....
Go to
tinypic.com/
Click on "Browse" and find the picture you want to use and Click on it
Than click on "Host It"
A new screen will open and your picture is now online.
Toward the bottom of the window you will be given 4 locations..
Link [
Tag [
Img [ IMG]http://tinypic.com/*****[ /IMG]
Url [
The IMG is the tag you will want to copy.
and than Paste this tag into your Profile Signature box
Click on the "Submit" button and
VOILA there you are.