Magento: Show price ranges of custom option prices in list.phtml instead of base price

Magento: Show price ranges of custom option prices in list.phtml instead of base price

<!-- code change to show price ranges -->
<?php
$product = Mage::getModel('catalog/product')->load($_product->getId());
$prodPrice = $product->getPrice();
if($product->getOptions()){
    $minPrices=array();
    $maxPrices=array();
    foreach ($product->getOptions() as $_option) {
        switch ($_option->getType()) {
            case 'field': case 'file': case 'area': case 'date_time': case 'date': case 'time':
            if($_option->getIsRequire()){
                $minPrices[] = ($_option->getPriceType()=='percent') ? $prodPrice*$_option->getPrice()/100 : $_option->getPrice();
            }
            $maxPrices[] = ($_option->getPriceType()=='percent') ? $prodPrice*$_option->getPrice()/100 : $_option->getPrice();
            break;
            case 'radio': case 'drop_down':
            $valuePrices=array();
            foreach ($_option->getValues() as $_value){
                $valuePrices[] = ($_value->getPriceType()=='percent') ? $prodPrice*$_value->getPrice()/100 : $_value->getPrice();
            }
            sort($valuePrices,SORT_NUMERIC);
            if($_option->getIsRequire()){
                $minPrices[] = $valuePrices[0];
            }
            $maxPrices[] = array_pop($valuePrices);
            break;
            case 'multiple': case 'checkbox':
            $valuePrices=array();
            foreach ($_option->getValues() as $_value){
                $valuePrices[] = ($_value->getPriceType()=='percent') ? $prodPrice*$_value->getPrice()/100 : $_value->getPrice();
            }
            sort($valuePrices,SORT_NUMERIC);
            if($_option->getIsRequire()){
                $minPrices[] = $valuePrices[0];
            }
            $maxPrices[] = array_sum($valuePrices);
            break;
        }
    }
    $minTotal = $prodPrice + array_sum($minPrices);
    $maxTotal = $prodPrice + array_sum($maxPrices);
    if($minTotal==$maxTotal){
        echo '<div class="price-box"><span class="regular-price">'.Mage::helper('core')->currency($minTotal).'</span></div>';
    } else {
        echo '<div class="price-box"><p class="price-from"><span class="price-label">From:</span>'.Mage::helper('core')->currency($minTotal).'</p><p class="price-to"><span class="price-label">To:</span>'.Mage::helper('core')->currency($maxTotal).'</p></div>';
    }
} else {
    echo $this->getPriceHtml($_product, true);
}
?>
<!-- end price range code -->

<?php //echo $this->getPriceHtml($_product, true) ?>

very helpful..