[Opserty]

Edit the forumhome_forumbit_level2_post template. On that site they have added something like the following:

tr align="center">
	<td class="alt2"><img src="images/statusicon/forum_old.gif" alt="" id="forum_statusicon_124" border="0"></td>
	<td class="alt1Active" id="f124" align="left">

<div style="margin: 0px; padding: 0px; float: left;">
<img src="images/statusicon/124.gif" alt=""></div>

		<div>
			<a href="forumdisplay.php?f=124"><strong>Maintenance and Repairs</strong></a>
			<span class="smallfont">(6 Viewing)</span>

		</div>
		<div class="smallfont">General LSX Maintenance and Repairs</div>
		
		
	</td>
	<td class="alt2">
<div class="smallfont" align="left">
	<div>
		<span style="white-space: nowrap;">
		
		
		<a href="showthread.php?goto=newpost&amp;t=3171" style="white-space: nowrap;" title="Go to first unread post in thread 'Taylor 10.5 MM wires  = JUNK'"><strong>Taylor 10.5 MM wires  = JUNK</strong></a></span>

	</div>
	<div style="white-space: nowrap;">
		by <a href="member.php?find=lastposter&amp;f=124" rel="nofollow">dixonk</a>
	</div>
	<div style="white-space: nowrap;" align="right">
		09-06-2008 <span class="time">11:51 AM</span>
		<a href="showthread.php?p=39636#post39636"><img title="Go to last post" class="inlineimg" src="images/buttons/lastpost.gif" alt="Go to last post" border="0"></a>

	</div>
</div>
</td>
	<td class="alt1">31</td>
	<td class="alt2">302</td>
	
</tr>

In the template it probably looks like this:

<div style="margin: 0px; padding: 0px; float: left;">
<img src="images/statusicon/$forum[forumid].gif" alt=""></div>

Then you can just name your forum icons like 19.gif for the forum that has the id number 19 e.t.c.