OpenCart website customisations - urgent

I need a programmer to add a couple of new fields to our opencart Product edit view. (In the admin) 1) We need a new field called 'Sub title' which will allow then pull through to the product details view as an H3. 2) Add a new field for 'Product title' which will allow line breaks <br> to format the product titles correctly. (The H1 title on the products) 3) We need the 'Additional Images' to be changed to a set width; but not a fixed height? (as all the images are different shapes, ratios). The current 240x240 square does not work for most of the photos. We just need them to be 240 width; but a dynamic height. DEADLINE: Needs to be done in the next 24hours. (9pm Tuesday evening GMT) The rest of the website works all ok; and is nearly finished. Thanks for looking; Craig