product info display background colour

[1kell]

I want to have my add to cart, attributes, price etc all in a box together with a coloured background. I have thought about it, created a new "div id" in tpl_product_info_display, and then formatted the background colour in the stylesheet. It sort of worked, but the "div" will only encompass the price block and attributes, I can't get it to include the add to cart bit. This is my code from the tpl_product_info_display.php. The new div is clearly marked at open and close as "shoppingbox".

<div id="shoppingbox">
<!--bof Product Price block -->
<h2 id="productPrices" class="productGeneral">
<?php
// base price
  if ($show_onetime_charges_description == 'true') {
    $one_time = '<span >' . TEXT_ONETIME_CHARGE_SYMBOL . TEXT_ONETIME_CHARGE_DESCRIPTION . '</span><br />';
  } else {
    $one_time = '';
  }
  echo $one_time . ((zen_has_product_attributes_values((int)$_GET['products_id']) and $flag_show_product_info_starting_at == 1) ? TEXT_BASE_PRICE : '') . zen_get_products_display_price((int)$_GET['products_id']);
?></h2>
<!--eof Product Price block -->

<!--bof Attributes Module -->
<?php
  if ($pr_attr->fields['total'] > 0) {
?>
<?php
/**
 * display the product atributes
 */
  require($template->get_template_dir('/tpl_modules_attributes.php',DIR_WS_TEMPLATE, $current_page_base,'templates'). '/tpl_modules_attributes.php'); ?>
<?php
  }
?>
<!--eof Attributes Module -->

<!--bof Form start-->
<?php echo zen_draw_form('cart_quantity', zen_href_link(zen_get_info_page($_GET['products_id']), zen_get_all_get_params(array('action')) . 'action=add_product'), 'post', 'enctype="multipart/form-data"') . "\n"; ?>
<!--eof Form start-->
<br><br><br><br><br><br>
<!--bof Add to Cart Box -->
<?php
if (CUSTOMERS_APPROVAL == 3 and TEXT_LOGIN_FOR_PRICE_BUTTON_REPLACE_SHOWROOM == '') {
  // do nothing
} else {
?>
            <?php
    $display_qty = (($flag_show_product_info_in_cart_qty == 1 and $_SESSION['cart']->in_cart($_GET['products_id'])) ? '<p>' . PRODUCTS_ORDER_QTY_TEXT_IN_CART . $_SESSION['cart']->get_quantity($_GET['products_id']) . '</p>' : '');
            if ($products_qty_box_status == 0 or $products_quantity_order_max== 1) {
              // hide the quantity box and default to 1
              $the_button = '<input type="hidden" name="cart_quantity" value="1" />' . zen_draw_hidden_field('products_id', (int)$_GET['products_id']) . zen_image_submit(BUTTON_IMAGE_IN_CART, BUTTON_IN_CART_ALT);
            } else {
              // show the quantity box
    $the_button = PRODUCTS_ORDER_QTY_TEXT . '<input type="text" name="cart_quantity" value="' . (zen_get_buy_now_qty($_GET['products_id'])) . '" maxlength="6" size="4" /><br />' . zen_get_products_quantity_min_units_display((int)$_GET['products_id']) . '<br />' . zen_draw_hidden_field('products_id', (int)$_GET['products_id']) . zen_image_submit(BUTTON_IMAGE_IN_CART, BUTTON_IN_CART_ALT);
            }
    $display_button = zen_get_buy_now_button($_GET['products_id'], $the_button);
  ?>
  <?php if ($display_qty != '' or $display_button != '') { ?>
    <div id="cartAdd">
    <?php
      echo $display_qty;
      echo $display_button;
            ?>
          </div>
  <?php } // display qty and button ?>
<?php } // CUSTOMERS_APPROVAL == 3 ?>
<!--eof Add to Cart Box-->
<br class="clearBoth" />
</div><!-- #shoppingbox -->

ps my site is here Script writers, any idea why it won't quite work? I am an amatuer but had a go!