How to load specific module positions within the JReviews theme files
From Documentation
In the listing detail page theme file (detail.thtml), you can use standard Joomla Loadposition plugin to load modules assigned to the specified position (i.e. user1 in this case):
{loadposition user1}
In other theme files you will need to use this code:
<?php $position = 'user1'; $params = array('style'=>''); $document = &JFactory::getDocument(); $renderer = $document->loadRenderer('module'); $contents = ''; foreach (JModuleHelper::getModules($position) as $mod) { $contents .= $renderer->render($mod, $params); } echo $contents; ?>