Hi Rodger,
One of the missing items in the list is most of the countries for each airport probably because MSFS doesn't carry that info by airport. However, a little research will tell you that many of PNG's airport begin with the lettters "AY". With that information and assuming you have Excel, you could go into Excel, choose the Data tab, then choose Sort. In the Column section Choose "ident" in the 'Sort by' drop down option. Then select OK. When you get the Sort warning that some numbers are mixed with text in that sort key, choose "Sort number and numbers stored as text separately and select OK.
Excel will sort the "ident" column so that it runs from "0 to zzzz". Then you just need to go to the section where "AYxx" starts and you will find a big list of airports that are probably in PNG. You could do the same for Colombia which has a lot of airports that have "SKxx" as their ident.
Rod