Heres how you use option one in Flikr and post to this forum
When you open the box with "reply to thread" there are various options above the window you type in. There are options for formatting your text, and the font etc. Then you get some pictoral options. The first one a globe with a chain link on top of it is the one you want. It is "insert URL"
My inserting will pee the mods off cos the size is wrong right now but anyway here goes:
Option 1 says: <a href="http://www.flickr.com/photos/mulene/314095636/" title="Photo Sharing"><img src="http://farm1.static.flickr.com/117/314095636_757137b1ef_o.jpg" width="800" height="600" alt="third socks" /></a>
I click on "insert link" and paste that exact line into it and produce the following on this post: