Irish" is on the money. The only thing I would add, After you click on the [IMG] it should copy it for you. When you come back here and get ready to put it in a message, Right click on the mouse, and a window will open up, go down to where you see "Paste" and click on it. You will see your Image URL appear. then when you click post in the message box, it should have the picture and not just the link.
Hope I didn't confuse you.