[Zero Tolerance]

Let's say you had:

PHP Code:

eval('$userpage = "' . fetch_template('YOUR_TEMPLATE') . '";'); 


Above that you would have:

PHP Code:

$vbulletin->templatecache['YOUR_TEMPLATE'] = str_replace(
                        array('{LEFTBLOCKSPACERWIDTH}'),
                        array($leftblockwidth),
                        $vbulletin->templatecache['YOUR_TEMPLATE']
                        ); 


Not sure about your if macro's though, best to just use an if in php:

PHP Code:

$leftblock = '';
if ($show['leftblock'])
{
    $leftblock = "whatever...";
} 


Hope that helps, be sure to change the array in the second code for the str_replace, and "YOUR_TEMPLATE"

- Zero Tolerance