If you want the OZx airstrips (340+) to show up in FSX airport selection list and being able to select to fly to and from them, you can download the BGL files at the bottom. That will add these airstrips to FSX list of airports/airstrips. The download contain one BGL for each region.
This is very basic. It does not contain afcad files, but you can select the airstrips in FSX list of airports, and start at a airstrip or fly direct to an airstrip by using the FSX flight planner and GPS. The airstrips that did not have an ICOA code I have allocated a YZ.. code so to facilitate selecting the airstrip by name or by code. I have added an excel spreadsheet for all the airstrips with their ICOA codes that is included with the download file.
If u don’t want to see the airstrips, they just remove the BGL. A very easy process.