Upload them to the gallary, or anywhere else upu can upload to. Then right click on the picture-then click properties. This will give you the actual adress of the pictures location. Cut and paste the http adress you see in to the box that comes up when you ckick the picture with the mountain on the the reply to thread window.
Also go to user CP-Options-Miscellaneous Options. Then select enchanced interphase on the drop down menu.