Trying to get a promo overlay on product images. Needing several ones set up. If a retail and special price are both listed, I need an overlay that says sale. If the product has a free gift with purchase tag, I need the overlay to say Free Gift. And if the product has a clearance tag, I need the overlay to say clearance. Our company has a customized theme, so these features are not available. How can I add them without getting a developer involved?