8. How can I add a image to my boards background?
This can be done via:
Admin CP --> Skins & Templates --> Style Sheets --> Edit. Now find the following line in your CSS Content:

 
Code:
 
BODY { font-family: Verdana, Tahoma, Arial, sans-serif; font-size: 11px; color: #000000; margin:0px 10px 0px 10px; background-color:#FFFFFF }
 
Make it look like this (with the bold part added). Be sure to change the text marked in red:

 
Code:
 
BODY { font-family: Verdana, Tahoma, Arial, sans-serif; font-size: 11px; color: #000000; margin:0px 10px 0px 10px; background-color:#FFFFFF; background-image: url(http://www.domain.com/image.gif) }
 
Edit the text in red with the URL of the image you wish to set as your skins background image. Once you have completed that click on the Edit Style Sheet link at the bottom of the page.