Hi,
Search for this code in FORUMDISPLAY:
Code:
<!-- / controls above thread list -->
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center" style="border-bottom-width:0px">
<tr>
<td class="tcat" width="100%">$vbphrase[threads_in_forum] :<span class="normal">$foruminfo[title]</span></td>
The part I've highlighted in red is where you should add your <h1> tags. You should remove the span first, then add your headings.