Posting pictures is very easy once you do it once or twice.
1) Click reply or start a new thread as you normally would.
2) Click on the "Manage Attachments" button under the "Additional Options" section below where you type your message.
3) In the manage attachments window, click the "Browse" button. A open window will pop up. Find your image and click the "Open" button.
4) Back on the manage attachments window, click the "Upload" button and your image will show up in the "Current Attachments" section of the window. Click on the link to the image you want to show. This will open up a new window.
5) Copy the URL address of the webpage (control+C or right mouse button and Copy) and close the window.
You can go back to the image page anytime by clicking the link again in the manage attachment window, or from the attach files section in your below your original post.
6) Finally, go back to your original post. Click in your post where you want the image to be inserted, and click on the image icon above the text area. Paste (control+v or right mouse button and Paste) the URL from the picture page into the window that pops up and click Ok.
That is how you insert a picture. Repeat the steps if you want to put in more pictures. FYI there is a limit of 5 per post though. Also, if you want to make sure you did it all right, click the "Preview Post" button. You can also cut and paste the image code if you want to move the picture around.
If you have any questions feel free to ask here, or PM a moderator or admin.