Right hand click on the picture you want to post and select "Copy image URL"
Go to post on TAMB thread as per Flure's instructions ..... (look up where it says "Font", Size" etc) and click on wee green box which is just below (and slightly left) of the smiley face icon (it will say "image").
Once you've clicked on the wee green box a small box will appear which says "URL" with a blank space.
Right hand click in the space and select "Paste", then OK.
Then Click "Post" as you would with anything else on TAMB (hope that makes sense).