Old Tony and I were talking about this. And for we could come up with. Its not possable. And If someone can find a way its going to bloody hard/costly job.
This Should do the Job nicely
Add an new intercooler and hard piping you'll be flying
http://www.torqit.com.au/cars-4wd/nissan/navara/navara-d40-2-5tdi-2005-automatic-only-14kw-aluminised-exhaust-1447.html