Welcome to the board Joseph,
It's actually not very hard once you get the hang of it.
1. Click 'Img'
2. Right click on the image you'd like to share from your flickr page
3. Left click on 'Properties' in the box that appears
4. Highlight the complete address of the photo (
http://..............jpg)
5. Right click on the hightlighted address and select 'Copy'
6. Paste the address into your message for the board
7. Click 'Img' to complete
Hope this helps you
Walter