[markbolyard]

Sure, in the header find:

<script type="text/javascript"><!--
google_ad_client = "pub-9556872839910172";
google_alternate_color = "DDDDDD";
google_ad_width = 468;
google_ad_height = 60;
google_ad_format = "468x60_as";
google_ad_type = "text";
//2007-06-08: vBulletin Styles
google_ad_channel = "5984012549";
google_color_border = "DDDDDD";
google_color_bg = "DDDDDD";
google_color_link = "FFFFFF";
google_color_text = "FFFFFF";
google_color_url = "000000";
//-->
</script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script> &nbsp;

and replace it with:

<!-- 468x60 banner ad -->

That will remove it, yet allow you to remember where to put future banners in the header.

Next, edit FORUMHOME

Remove:

<script type="text/javascript"><!--
google_ad_client = "pub-9556872839910172";
google_alternate_color = "E8E8E8";
google_ad_width = 160;
google_ad_height = 600;
google_ad_format = "160x600_as";
google_ad_type = "text";
//2007-06-08: vBulletin Styles
google_ad_channel = "5984012549";
google_color_border = "E8E8E8";
google_color_bg = "E8E8E8";
google_color_link = "444444";
google_color_text = "444444";
google_color_url = "444444";
//-->
</script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>

and replace with whatever content you would like there. Also remember to change the text "Advertisements" in the FORUMHOME template, to whatever you would like to call that block. If you want to remove that entire block...

remove:

<br />
<table border="0" cellspacing="0" cellpadding="0" width="100%" align="center">
 <tr>
  <td><img src="$stylevar[imgdir_misc]/sideleft.gif" border="0" alt="" /></td>
  <td class="sidebg" valign="middle" align="center" width="100%">
Advertisements
  </td>
  <td><img src="$stylevar[imgdir_misc]/sideright.gif" border="0" alt="" /></td>
 </tr>
</table>
<table class="tborder" border="0" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" width="100%" align="center">
<tr>
<td class="alt1">
<script type="text/javascript"><!--
google_ad_client = "pub-9556872839910172";
google_alternate_color = "E8E8E8";
google_ad_width = 160;
google_ad_height = 600;
google_ad_format = "160x600_as";
google_ad_type = "text";
//2007-06-08: vBulletin Styles
google_ad_channel = "5984012549";
google_color_border = "E8E8E8";
google_color_bg = "E8E8E8";
google_color_link = "444444";
google_color_text = "444444";
google_color_url = "444444";
//-->
</script>
<script type="text/javascript"
  src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td>
</tr>
</table>

Hope that's helpful.