There are two ways you can do this:
Click on the picture of a picture above that will give you tags that look like this [img]http:/www.xxxxxxpic.com/pic.jpg[/img]
and then you can place a link to the picture in between the tags. Or you can click on additional options below and upload the picture from your desktop.
I think jasandalb is only on One word kind of man lol.......................to the point...
irfanview is a simple free easy to use program for editing/sizing those photos you want to share
get it here.
http://www.irfanview.com/