Step 4
Click back on to the PR tab. In the reply box paste the code you have copied from Flickr. In front of the code, type in '{url=' as shown in the image above. At the end of the code, type in '}' (swap the squiggly bracket for the square brackets [ ])
Step 5
Click back on the Flickr tab, and then click on the 'Medium Size' option. Scroll back down to 'Option 2' and copy and paste the code in the box.
Step 6
Click back in the PR tab and paste in the code. At the point where you inserted this code, enter '{img}' at the front, and then at the end of the code, enter '{/img}{/url}' (swap the squiggly bracket for the square brackets [ ] ). Finally, click on the 'post thread' button at the bottom of the PR page and hey presto, you should have a clickable link for you photo
EDIT: Apologies for the images being so small. If you need to see the large size let me know and maybe I can email you the images.