I was wondering if anyone here has ever added an automatic discount to a shipping method in magento before. FedEx is the only company I ship with, but I have 3 different methods of FedEx. I want to add a discount to 2 of the 3 methods, and display these discounts at the method selection screen automatically at checkout(to make it seem like they are getting a deal with the higher priority shipping I suppose?). I found which file displays the methods, but I don't think this is the file I need: template/checkout/onepage/shipping_method.phtml
Does anyone know which file these are displayed in so that I can slash out the real price, and add the discounted price bellow it? I suppose I could change the shipping price by just subtracting from the variable price, correct?