It took me years to figure out how guys put up those beautiful photos, here's the skinny:
Make an account at a photo sharing site like photo bucket or imageshack. It's free. Upload your files from your computer. Each photo now has a direct link, cut and paste that into the bracket you get when you hit the Img button in the line of brown buttons under the subject space.
It helps to have a couple browser windows open when you are doing this.
Hit preview, and if you did it right you will see your photo in your message. If not, try again. You'll get it.
It's much easier than it sounds, like this:
[img:19fgyl34]http://img401.imageshack.us/img401/7029/p7270016.jpg[/img:19fgyl34]
You were expecting a bass picture? Too bad

Oh, okay, here:[img:19fgyl34]http://img207.imageshack.us/img207/9808/fearfulskiesangle.jpg[/img:19fgyl34]
Once you convert, there's no going back and we have one more guy prowling the waters for Dingwalls.