Hi dazessex
Welcome to the forum!
You have to have the picture loaded into an online album to be able to post it here. One of the most commen sites is Photobucket.
Once you get it uploaded,you will need to click on the "full reply form" button at the bottom of the quick reply box. When you get to the full reply form you will see a box below where you type that says "Instant ubb code". There is a button there that says "image". When you click on that a window will pop up and then you can copy and paste the address for the picture you want. Click OK and it should show up just fine
Hope this helps
G~Mom