OOps, Casper beat me to it.
Yeah,you need to look the arrow symbol beside your photo,3rd one along and click it.
Then select BBCode and select the image size-put your cursor on the link to highlite it in blue;right click copy.
Then open a thread on here;paste your image/images,then click preview,then post,and hopefully that will work.
I think that`s correct-if not I apologise.