Install Google SEO, simple. The forum may be small but it does have enough content that could be indexed even easier through Google using the plugin that simplifies the way things look on the forum. Using IDs rather than words makes it look rather, unknown.
http://google.com/thread.php?pid=1
http://google.com/thread.php?Hello-to-all&pid=1
Which looks better?
http://google.com/thread.php?pid=1
http://google.com/thread.php?Hello-to-all&pid=1
Which looks better?