After you save a copy of your header template to have as a backup incase there is an issue, Replace your header template with the following:
You will have to edit your image width to fit the page...
Code:
<!-- content table -->
$spacer_open
$_phpinclude_output
<!-- logo -->
<a name="top"></a>
<div id="header">
<div id="nav">
<ul>
<if condition="$show['member']">
<li><a href="usercp.php$session[sessionurl_q]">$vbphrase[user_cp]</a></li>
</if>
<if condition="$show['registerbutton']">
<li><a href="register.php$session[sessionurl_q]" rel="nofollow">$vbphrase[register]</a></li>
</if>
<li><a href="faq.php$session[sessionurl_q]" accesskey="5">$vbphrase[faq]</a></li>
<li><a href="memberlist.php$session[sessionurl_q]">$vbphrase[members_list]</a></li>
<if condition="!$show['member']">
<li><a href="search.php?do=getdaily$session[sessionurl_q]">$vbphrase[todays_posts]</a></li>
</if>
<li id="navbar_search"><a href="search.php$session[sessionurl_q]" accesskey="4" rel="nofollow">$vbphrase[search]</a>
<if condition="$show['quicksearch']"><script type="text/javascript"> vbmenu_register("navbar_search", true); </script></if></li>
<if condition="$show['member']">
<li id="usercptools"><a href="$show[nojs_link]#usercptools" accesskey="3">$vbphrase[quick_links]</a> <script
type="text/javascript"> vbmenu_register("usercptools", true); </script></li>
<li><a href="login.php?$session[sessionurl]do=logout&logouthash=$bbuserinfo[logouthash]" onclick="return log_out
('$vbphrase[sure_you_want_to_log_out]')">$vbphrase[log_out]</a></li>
</if>
</ul>
</div>
<table align="center" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="center">
<img height="96" src="http://www.tpctrikes.com/forum/images/IMG_1545.jpg" style="border-style: none" alt="" />
</td>
<td align="center">
<a href="http://www.tpctrikes.com" border="0"><img height="96" src="http://www.tpctrikes.com/forum/images/banner.jpg" style="border-style: none" alt="" />
</td>
<td align="center">
<img height="96" src="http://www.tpctrikes.com/forum/images/TPC Air.jpg" style="border-style: none" alt="" /></a>
</td></tr></table>
<!-- /logo -->
</td>
</tr>
</table>
<table cellspacing="0" cellpadding="0" border="0" width="100%">
<tr valign="top">
<td class="main_cell" style="padding: 10px $stylevar[spacersize]px">
$ad_location[ad_header_end]