Here are Michelle's easy to understand instructions.
You must have your image hosted online. If you don't have a website, try a free hosting site like Photobucket.
After you upload your images, Photobucket (or whatever site you choose) usually has an already written string of code for you to put up.
The code should start with [img]and%20end%20with[/img]
If you are hosting your own pictures, the code should look like this:
(with no spaces)
PLEASE, don't post pictures bigger than 450 wide or 450 tall. They take forever to load for the dialup people.
There's a fine line between genius and insanity. I have erased this line.