Peter it's actually real easy (believe me, if I can do it with a computer anyone can.) The sequence below I copied and pasted from your gallery. Whenever you open a pic look down at the bottom (where people comment on the pic) of that page and you'll see a block with something like this;
[Ximg]http://www.clubcobra.com/photopost/data/500/medium/IMG_0090.JPG[/imgX]
Except without the "X"s at the front and rear. If you copy and past that link into your post it tells the computers to show that linked pic in your post. That's what the "[img]" at the front and the "[/img]" at the back of the link are for. For instance; if the "X"s are removed from the above link you get this (hope it works):
Hope that helps, Steve