To display an image you need to put its address between two 'tags'.
At the start put:
And after the address put
So here is an example of how I would load the DC logo in to this topic:
That line would result in this:
If you don't have any web space to put your images on then don't worry. Go to this web page http://www.imageshack.us/index.php
and click the 'Browse' button. They will then allow you to upload your image and also give you the address that you need to put between the two tags I showed above.