Magento getting a products rewritten URL

If you look at this thread; http://www.magentocommerce.com/boards/viewthread/10807/

It adds a products rewritten url to the collection using;

$collection->addUrlRewrite($categoryId);

I am not getting products this 开发者_JS百科way, I am using this method to get an individual product:

$product->load($productId);

After quite a bit of searching I cant seem to figure a way of getting a products rewritten url using this method, can anyone tell me how I may go about this please?

Thanks

---

I'm not quite sure whether "rewritten url" means request_path or target_path in your question context, but anyway.

To get the request path of a single product you can do this:

$oProduct = Mage::getModel('catalog/product')->load($productId);
var_dump(
    $oProduct->getUrlPath()
);

To get the target path, you can use this:

$oProduct = Mage::getModel('catalog/product')->load($productId);
$oRewrite = Mage::getModel('core/url_rewrite')->loadByRequestPath(
    $oProduct->getUrlPath()
);
var_dump(
    $oRewrite->getTargetPath()
);