Upload from your camera and save it somewhere easy for you to find it.
Find a hosting website like
as an example)
Browse, select, and hit okay when found image
Hit the upload button
Either copy the actual link, OR if the option is given, copy the link with the [IMG] tags on it.
IF THERE ARE NO IMG TAGS,
Come to the PbN reply box
Look on the toolbar and find the insert image button, and click it
Post the link which you copied earlier.
It should look like [IMG]http://i6.tinypic.com/262qk36.jpg[/IMG]