If you want to allow your customers to order for sample of any product, before purchasing the actual product, it becomes very tough as in a product page you can’t have two products (sample + full) allowed. But it’s not a good idea to display sample products as Individually, it makes sense only in the actual product page just near the Add To Cart button.

But the question is, how to have TWO SKUs in a single product detail page? Here is the code that will do exactly what you want now. Open your catalog/product/view.phtml template file and put this code just below the code “$this->getChildHtml(‘addtocart’);”

<button http:="" onclick="window.location.href='/order_sample.php?sku=<?php echo $this->htmlEscape($_product->getSku()) ?>'” title=”Request Sample for <?php echo $this->htmlEscape($_product->getName()) ?>” class=”button btn-cart” ><span><span>Order Sample – $1</span></span></button>