You need to hover over the picture you want to upload to here, then when the box below appears, slowley move the mouse to the bottom ser of character (starts with then left click to high light. Once its high lighted press control and c together to copy the code. Now go back to your new post and click into it. Now press control and v to paste. The code should appear. then just go about the post in the normal way and once the post is posted you'll see your photos.
Hope this helps
Steve