Order Printer Pro: PDF Invoice

I wanted to create invoice-pdfs that look exactly like my layout of my existing (and designed) stationary. It did what it should, but I was hoping that the integration into the Shopify world would be direct and not the route with copy&pasting code into line xxx in Shopify's 800+ line coding. I used a template that I bought and tried the customization, but my chosen invoice theme (Paris) did not really offer much customization. I ended up using it, and then coding it with my rookie html/css skills.