I use the http://www.vbulletin.org/forum/showthread.php?t=91888 for the left column and add the code to the style. I use Extremepixels iskin black so it might be in a different place than it is located in iskin black. I put the code at the beginning of the 'header' part of the style. Be sure to adjust the location of the code so it will show up right on your page. It is located in the first two lines.
<script type="text/javascript" src="http://4.adbrite.com/mb/jscript_array.php?sid=123456"></script>
<script type="text/javascript">
if (window.AdBrite)
{
if (AdBrite.length > 4)
{
a = 4;
}
else
{
a = AdBrite.length
}
for ( x = 0; x < a; x++ ) {
var AdBriteURLArray = AdBrite[x][0].split('/');