CMS Little thumbnails in widgets
 

I am trying to add little thumbnails to the "last forum post widget" like you can see on this page of the vBulletin forum: http://www.vbulletin.com/forum/content.php (look on the right side).

This is our new forum where I am trying to do that: http://www.2cv.com.au/content.php

Anybody knows how to do that?