[Bilderback]

If your talking about the <installcode></installcode> in product xml...
$vbulletin->db->query_write

I am still new to vb database but maybe one of these below?
~pulled the code from installed mods.

<installcode>
<![CDATA[
$db->hide_errors();
$vbulletin->db->query_write("
CREATE TABLE IF NOT EXISTS " . TABLE_PREFIX . "TABLENAME
	(
	`tableid` int(32) NOT NULL default '0',
	PRIMARY KEY (`tableid`)
	) TYPE=MyISAM
");
]]></installcode>

with auto_increment

<installcode>
<![CDATA[
$db->hide_errors();
$vbulletin->db->query_write("
CREATE TABLE IF NOT EXISTS " . TABLE_PREFIX . "TABLENAME
	(
	`tableid` int(32) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
	) TYPE=MyISAM
");
]]></installcode>