Hi Helorime:
The easiest way to post an image is to downloaded it to your computer and then included it as an attachment to your coment. To included this way, you have the "Attachments and other options" under the box in which you write your post. With this method, only the ones that log in will be able to see the image.
The second way to do it, is to open an account in a service in which you can have the picture all the time, like photobucket (or others). Then you will insert the link of the image with the "Insert Image" option (second row, second column). In this way, everybody will see the image (not just the ones that are logged in).
