when you start a new thread or post a reply there is an area below the box you type in....it says Attach Files...click on the browse button, then go to wherever you have the picture stored on your computer when the little box pops up. Click on the file that has the pic, then click "open", then click on the actual file name. The file letters/numbers will show up next to the browse button. Then hit submit.
I do need to apologize because I don't know the correct computer terminology.
Hope I was some help to you.