The images don't seem to be working in this section of the board, but they do work on the main section. They don't woek for me either, I just tried. Maybe the rules are set up differently between the two board sections?
But the url command does seem to work, so just use that for now.
http://www.boomspeed.com/yenko/w1.jpg
http://www.boomspeed.com/yenko/w2.jpg