Here is the index for testing. To use, place the X folder in your mission root folder and ALiVE will do the rest.
https://www.dropbox.com/s/e2c7f1b1inr7834/prei_khmaoch_luong.zip?dl=0
I'd recommend mission makers place their own ambient helicopters and helipads, as well as disabling ambient vehicle spawns for civilians and military due to how close a lot of the objects are placed.
Assuming there are no major issues, this will be merged in a future ALiVE release.