Hope this helps, it works if you are linking photos hosted on
Flickr
Step 1
In IE or Firefox open up two tabs, one for PR and the other for Flickr. In the PR tab, navigate to the thread you want to post in, and click on 'Reply'. This will bring up a box which you will post the code into - don't enter anything in the reply at the moment. Click on the Flickr tab and navigate to the photo you want to post.
Step 2
In the Flickr tab (with the correct photo displayed), click on the 'All Sizes' option.
Step 3
Flickr will automatically display the largest size - this is what we want. Scroll down and you will find Option 2. Highlight the code in this box, and then either right click and 'copy' or 'ctrl+c'
Steos 4, 5, & 6 to follow...