And some smileys are wrong
When someone does like this:
- _ - (without spaces), it becomes, like this

ph34r is weird O_O
And here's a tutorial
Go 2 /Themes/yourtheme/index.template.php
Look For:
if (empty($settings['header_logo_url']))
echo '
<span style="font-family: Verdana, sans-serif; font-size: 140%; ">', $context['forum_name'], '</span>';
else
echo '
<img src="', $settings['header_logo_url'], '" style="margin: 4px;" alt="', $context['forum_name'], '" />';
echo '
</td>
<td align="right" class="catbg">
<img src="', $settings['images_url'], '/smflogo.gif" style="margin: 2px;" alt="" />
</td>
</tr>
</table>';
Change that to
if (empty($settings['header_logo_url']))
echo '
';
else
echo '
';
echo '
</td>
<td align="center" style="background-image: url(http://www.unitedspongebob.com/forums/Themes/YOURTHEME/images/catbg.jpg);">
<img src="YOUR LOGO">
</td>
</td>
</tr>
</table>';
I used it in my old SMF board, and it worked
