To post the pic;
1 = click on Image Hosting up by the top banner, that brings you to your photos you've saved to Image Hosting.
2 = when you decide what pic you want to post, scroll below it and left click on Image URL (the forth row down, under the pic). That will highlight the URL in blue.
3 = right click on the now-highlighted blue bar, and choose "copy".
4 = start your post/message in the message box at the bottom of the thread page - just like you were going to write a reply to a thread. Right click on the yellow square box with a landscape in it, it's the next-to-last icon in the top of the message box.
5 = when you click on that yellow landscape box, you will get a pop up box that prompts you to add the URL of your image. To do so, first delete the "http" that's already in there, highlighted in blue. Then right click to paste your pic's URL, the one you just copied on your Image Hosting page. That will insert your pic into the message.
I'm not the greatest at explaining things - I hope I wasn't too convoluted! lol
oops! edited to change step 5. I had to go through the steps, and realized I don't know my left from my right - lol