I did a good one, showing how to post pics, but I have no idea who it was to, or what the topic was - I hope someone can find it and link it here.
In words - find an image hosting source (I use photobucket), upload the pic to that, view the image you uploaded, and you have the choice in PB to copy the direct image extension.
When you post, click the image icon, (11th one over from the left, 9th one over from the right). Past that image extension into the space, and post the pic.
Or, just click the "More Reply Optons" tab at the lower right when you're posting. Once you do that, you'll see an "Attach Files" tab at the lower left, once that screen loads - you can search out the image location from your computer hard drive, and attach it directly.