I'm gonna move to new zealand, did you guys see that engine bay! No rust, no corrosion no salt residue. Looks like it just rolled out of the showroom. I bet you can take stuff apart with hand tools, no cutting torch required!
Back on topic... Your engine is a standard AAZ 1.9TD with the addition of EGR. Follow the instructions "Make your 1.9TD a faster car" in the FAQ to get started. That will fix the pesky EGR and add lots more power. If you still want more, come on back and ask specifics...