Edit your
printthread template...
Find the code:
Code:
<br />
<div>
<a href="$vboptions[bburl]/$vboptions[forumhome].php" accesskey="1"><strong>$vboptions[bbtitle]</strong></a>
(<span class="smallfont"><em>$vboptions[bburl]/$vboptions[forumhome].php</em></span>)
</div>
Above that add:
Code:
<br />
Printed By: $bbuserinfo[username]
You can move the code around to suit your needs, that seemed like the best place for me.