Different Post Icons?

[hitmanuk2k]

<a href="http://www.myfootballforum.com/forum.php" target="_blank">http://www.myfootballforum.com/forum.php</a> - How is this done? The new/old post icons being different from each other. (The icons that appear to the left of the forum title in the display).

[SwishG4G]

Heya guys, Im also having problems with this, and think it would look really cool, like the one on that forum that hitman linked to.

Does anyone know how to do this?