I would add to my comments, without trying to sound superior - that I find PNG easy to fly in. If you have any mountain time elsewhere and apply the same rules, carry more fuel than you need, work the loadings to your favor and always have a plan. Its a lot easier to fly in than say Canada. There are no off field landings; 95% of what you do is to prepared sites or within a defined area.
One major issue I see with the place is the incompetent maintenance and **** machinery. HNG's fleet of LR's are like a fleet of ex-rental AVIS cars. Ridden hard and put away wet...
There is also a typical kiwi/aussie mentaliity of undercut the other guy to drive him down. Everyone loses and the uber wealthy resource company laughs all the way to the investors. The management of all the companies are their own worst enemy.