NOTE: THIS WILL REMOVE AI BASES
NOT WORKING WITH AUSTRALIA MAP
After seeing this being requested a lot I tinkered around in the Arma 3 mission editor and NMD PBO files and found that it could easily be ported to any map c:
Have fun and don't forget to ask for PBO permission from the glorious savior/creator if it is not a personal mission.

Download and install PBO Manager[www.armaholic.com] from armaholic.
With PBO Manager load the NMD mission PBO
extract everything but the mission.sqm to a folder somewhere

Start up Arma 3 and go into editor and enter the 2D EDITOR (IMPORTANT) on whatever map you want to use. For Apex: In the editor menu press Ctrl+O on the map you want to load with the 2D editor, it must be selected first.
Place down a group of units (1 unit is 1 slot for players) so if i wanted 24 players for my server I would add 24 units.
Make them all playable by double clicking and setting it in each one.
You may wan't to make them all into a group or have multiple squads so select group mode with F2, hold Ctrl, click and drag the unit to the squad leader, you may want to do this for every unit on each side.

For the spawn points here a short tut from the Bohemia forums.

Step one - Editor - Markers
go to markers (F6) In the list you can pick whatever
type of marker you want but for basics let just choose a flag.
Place the flag marker where you want to respawn.

Step two - Editor - Name the Marker
This next step is we will need to indicate who will respawn at this marker.
The following list is the playable respawn classes:
respawn in base. Requires a marker named:

respawn_west ---> for Bluefor (USA)
respawn_east ----> for Opfor (Russia, Takistani, Iranians)
respawn_guerrila --> for Independent
respawn_civilian

for multiple spawns name them like:
respawn_west_1
respawn_west_2
respawn_west_3
and so on...

Please complete **ONLY REQUIRED FOR WORKING ZEUS** below if you want Zeus.
Now for the final touch save your mission as a user mission and then in save as export it to multiplayer missions or whatever you want.
Now find your mission PBO in your arma3directory/MPmissions now load it up in PBO Manager and copy those NMD files from earlier into the PBO Manager (if it freezes click on the PBO Manager and accept the signature warning) then click the close file button.
And finally if you load it up all should work fine.
You can then share the .pbo to your mates to host locally unless you have permissions to host publicly, just get them to put it in their Arma 3/MPmissions folder.
If there is any major errors check that the scripts have copied properly into your mission PBO
Don't hesitate to reply if you are having any issues.

Place down a module (F7) in category choose Zeus and in module choose Game Master
In the name field put in NMD_curator
Go to one of you're units (the one you would like to be zeus) and give them a name
In the owner field put in the units name
Next put down a Set Attributes - Objects leave everything default
Next put down a Set Editing Costs and set everything under Assigned Zeus to -1

Do the exact same as before, 1 game master per player don't forget the two other modules, name the game masters:
CUP_curator_1
CUP_curator_2
CUP_curator_3
and so on...

Now go back and for each unit you want to use Zeus and give them any names
In each of the game masters put the each units name.