Like it Falcon. I have been a PNG fan for ages but as you say not much about scenery wise. Used to live there once upon a time and did some flying there but later and mostly coastal, really dangerous place to fly and one of the most challenging environments and flying in the world. All flying is literally hot and high, very hot and high elevations.
One of the problems there is most of the inland or highland strips are literally a goat track up the side of a hill, particularly the missionary strips. Others are missing altogether like WAU which has a good strip in real life and was the centre of PNG gold mining etc for a long time but not in FSX and because of the slopes and hills I surrended trying to get sloping runways working in FSX but it was and still is up to DC3 standard. The ORBX Tapini is good and the Holgar Mesh for PNG is recommended to get the elevation correct. There is an updated modern package for some of the main towns using photoscenery but all the rest are basically forgotten and unknown, there is a small number in FSX but not many. I found the Cal Classic Asia Pacific bundle had a few and they even did AI with timetables operating as per the 1960s which is fun to run across a C-47 doing a run now and then.
I have personally concentrated on float plane and flying boat bases and done a few using Instant Scenery. If you like I can bundle them up and drop them to you via a PM. I have done PNG Harbour (Fairfax Harbour), Ella Beach, Rabaul, Lake Kutubu, Finschafen, Jacquinot Bay, Moewe Harbour, Kavieno, Buka, Kiet, Queen Carola Harbour, Javieng, Talasea, Yandina.
I could not do Samarai Island (the old capital before Moresby) as it the island is missing completely in FSX and even ORBX Global could not fix that issue) but it is a classic time piece now with its dilapidated colonial buildings, the US Marines burnt the place to the ground during WW2 to stop the Japanese using it. Anyway if you drop them into you scenery folder you may have some objects but the water runways etc and location will come and they are accurate re position. You can say PNG was where my love affair with aviation started, something about being in the blister of the Qantas Catalina on take off and landing on the Fly river to get into your blood and an Otter on floats was some beast when your a little fella.
My go to in PNG is the Otter (Floats or wheeled), the Catalina and the JBK Sandringham. If I am feeling a bit more modern I will use the C-47, the Dash 7 or the Twin Otter. All Good fun. I have all the liveries for the period for all these birds. I have not tried any singles like the Cessna 180 and 206 which were used extensively in PNG - flew them for real once upon a time not my cup of tea.
JUst remember like the real place, if you have real weather selected go early and get home before lunch, the builds up and cloud in the afternoon is a no go. And yep the hills around Mount Hagen are above F150.
Oh yes and Rabaul is no good anymore even ORBX etc show the place as it is now post the volcano eruption which basically destroyed old Rabaul, which is a shame but way it is. Had a few good overnights there fascinating place. Same as Guadacanal and all those strips back and forth to PNG as well. Never ending sim pleasure.
PNG-2020-sep-28-001 by Ed Wells, on Flickr
