If you get a photobacket account you can post pics by inserting the complete url between the img link provided above
for example
I have a pic at
http://s520.photobucket.com/albums/w326 ... 408001.jpg
so I would click on the Img button above and insert the url less this part
?action=view¤t=
so you end up with

like this

you may of course use the web host of your choice but it would work the same regardless......
hope this clarifies things a bit,I know it took me a while to sort it out the first time
