If you have the main reply box open (Rather than quick reply) there are UBB buttons above the reply box that look like they're in 3 sections, the image button is to the left of the youtube button:
IF you are using a host. Alternativley, you can us the "Add attatchment" button towards the top right of the reply box to upload directly and attach an image file. All I would ask is if you do this, please try and make sure they're not massive pictures for everyon'e benefit. If they are an image host is peferable and/or I may have to resize the pictures myself.
RAW Click to read the Renegades At War story by Jazz!