I have a Prestashop website that sells computer parts and gadgets in Brazil (actually I am only the webmaster, not the shop owner). I have installed a customized payment module and that way of payment gives the customer a percentage discount over the total value.
At the last payment step a Total value is shown, but since it differs from the original total value (because of the discount), the customers get confused, so all I need is to add a chunk of code similar to the shopping cart, where the customer will be able to remove items. I'm talking about the screen on /modules/<mypaymentmodule>/payment.php. Also, right below the cart details I would like a small table with the totals to be shown like: Total, Shipment, Discount, Grand Total. That should not be a big deal to do, but I need this customization quickly.
P.S. I also have installed a portuguese language module, so we will need to keep the existing support for internationalization.