Custom Add to Cart button on product page only

-- HikaShop version -- : 2.2
-- Joomla version -- : 3.1.5
-- PHP version -- : 5.3

I want to create a custom add to cart, however on the product page only

When I do a template over-ride, by overriding the function

function hikashop_button_render($map,$name,$ajax,$options,$url,$classname)

Hi,
I think that the best solution will be to do it by editing one of your view's file through "Hikashop->Display->Views".
Regarding your add to cart button code (of your product page) you'll be able to edit it through the quantity file of the product view of your front-end template.