Let me know if anyone has any issues with this. This should be the easiest way. There may be plugins that make it slightly easier. I can always look if folks have issues with this method.
Are you still limited on the amount of space you are allowed to upload? This is what I normally do to share a picture. Easy and works on pretty much any forum.
Goto http://tinypic.com/
Follow instructions to upload a photo.
Copy the "IMG Code for Forums" and paste it here.