[marklar]

Ok, you intrigued me so I looked.

The code is in the 'threadbit' template. This is the code for the thread title link:

<a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]"><if condition="$show['gotonewpost']"><strong>$thread[threadtitle]</strong><else />$thread[threadtitle]</if></a>

All you need to do is add the bit in bold here:

<a href="showthread.php?$session[sessionurl] goto=lastpost&amp;t=$thread[threadid]$thread[highlight]"><if condition="$show['gotonewpost']"><strong>$thread[threadtitle]</strong><else />$thread[threadtitle]</if></a>