You can add the manufacturer's name below the image in the New Products module for the Centerbox by changing the code in the file:
/includes/modules/new_products.php
and using your templates and overrides, around line 71 use:
$manufacturers_name= zen_get_products_manufacturers_name($new_products->fields['products_id']);
$list_box_contents[$row][$col] = array('params' => 'class="centerBoxContentsNew centeredContent back"' . ' ' . 'style="width:' . $col_width . '%;"',
'text' => (($new_products->fields['products_image'] == '' and PRODUCTS_IMAGE_NO_IMAGE_STATUS == 0) ? '' : '<a href="' . zen_href_link(zen_get_info_page($new_products->fields['products_id']), 'cPath=' . $productsInCategory[$new_products->fields['products_id']] . '&products_id=' . $new_products->fields['products_id']) . '">' . zen_image(DIR_WS_IMAGES . $new_products->fields['products_image'], $new_products->fields['products_name'], IMAGE_PRODUCT_NEW_WIDTH, IMAGE_PRODUCT_NEW_HEIGHT) . '</a><br />') . $manufacturers_name . '<br />' . '<a href="' . zen_href_link(zen_get_info_page($new_products->fields['products_id']), 'cPath=' . $productsInCategory[$new_products->fields['products_id']] . '&products_id=' . $new_products->fields['products_id']) . '">' . $new_products->fields['products_name'] . '</a><br />' . $products_price);