Nice mini indicators, just a shame it's a curvy :P
To post a pic as above hover over the pic you want and click on the "image code" box that appears to copy the text to paste:
In the highlighted bit it would be this:
HTML Code:
[IMG]http://i1141.photobucket.com/albums/n586/Mykey_Murrell/IMG_0561.jpg[/IMG]
The paste that in, the IMG tags tell the forum page to display the image URL inside of them
Hope that helps