well now that I look at the link I understand. You need to use a link that has a jpg or gif or some other image format.
when you have the image you want on your screen, try right clicking on it and select "properties" (if you're using a mac I'm useless for this part). Under properties it will show something that has a link with an image format. if it doesn't (because the image itself is link, like the photo of Trey above) then go to the actual link instead of the thumbnail and try again. The image will be resized here anyway so don't worry about that. TPC has you covered there. Take that to use between the [img] tags here.
I sure would love to virtually participate in the fledge watch you guys are having, so it'd be great if the image showed! (BOT, see?)