I have it installed and played with the link from the arcade home a tad. My html isn't great but this worked fine.
Instead of editing the arcade_main as per your instructions, I edited it this way:
Find:
Code:
<div class="smallfont" style="padding: 4px">$vbphrase[searchresultsappearbelow]</div>
</div>
</td>
</tr>
</tbody>
Add Under:
Code:
<thead>
<tr align="center">
<td class="thead"><a style="float:$stylevar[right]" href="#top" onclick="return toggle_collapse('leaderboard')"><img id="collapseimg_leaderboard" src="$stylevar[imgdir_button]/collapse_thead$vbcollapse[collapseimg_leaderboard].gif" alt="" border="0" /></a>Arcade Kings</td>
</tr>
</thead>
<tbody id="collapseobj_leaderboard" style="$vbcollapse[collapseobj_leaderboard]">
<tr align="left">
<td class="alt1" valign="top" style="padding: 4px">
<table cellpadding="0" cellspacing="0" border="0" width="100%" align="center">
<div class="smallfont">Are you the King? Check out our <a href="$vboptions[bburl]/arcade.php?$session[sessionurl]do=lboard"><strong>$vbphrase[leader_board]</strong></a> to view the top 10 players!</div>
</table>
</td>
</tr>
</tbody>
If you see anything that needs to be cleaned up, lemme know. Attached is the result: