Hi senojeel

As pointed out this is hard coded from a standard product page. Each button is created as follows:

<form action="http://[your domain name]/index.php?main_page=product_info&amp;cPath=[your cPath]/&amp;products_id=[your products_id]/&amp;action=add_product" method="post" enctype="multipart/form-data" name="cart_quantity" id="cart_quantity">
<input type="hidden" name="cart_quantity" value="1" maxlength="6" size="4" />
<input type="hidden" name="products_id" value="[your products_id]" />
<input name="image" type="image" title=" Add to Cart " src="includes/templates/template_default/buttons/english/button_in_cart.gif" alt="Add to Cart" />
</form>

Once you have the URL and cPath created for your first item, its a simple case of just changing the product_id on each button.