[LifesGreatestGift]

open FORUMHOME
include jQuery (1.4+) in your head.
then use

<div id="test-container" style="width:728px;height:90px;background-color:#FF0000;clear:both;">
</div>

<script type="text/javascript">
$('li#cat9').after($('#test-container'));
</script>

change the cat9 # to the category id you'd like to add the ad in the #test-container after.

should work but the code needs to be placed after

	<!-- main -->
        {vb:raw template_hook.forumhome_above_forums}
	<ol id="forums" class="floatcontainer">
		{vb:raw forumbits}
	</ol>
        {vb:raw template_hook.forumhome_below_forums}
	<!-- /main -->

and the script with the cat# id's must ALWAYS be placed after the ad divs

So if you wanted multiple ads, you would need multiples divs with unique ID's and just duplicate the jQuery code line and change the cat#

Something to look at and play with. Hope it helps.