VM2: VirtueMart 2.0.4, Include "Add To Cart" Button In Category View?

[swiftmedia]

How does one go about including the "Add To Cart" button in the Category View? (in VM 2.0.4)

Tried but the product object parameters are not being passed into this view:

(template_dir/html/com_virtuemart/category/default_addtocart.php)

$this->$product->virtuemart_product_id, $product->virtuemart_product_id, $this->virtuemart_product_id --- All return null, but the "Add To Cart" form needs this information in order to complete the action successfully.

Any ideas?