Just replace the file cities.dat file with your own and make it an addon to the austraila map, then you dont need permission. And honestly, i dont think anybody would care anyway.
Cities.dat has a very straight forward format. Per city it lists name, longitute, latitute, population, capital (yes/no = 1/0), country.
Long/lat are in a dezimal format like 21,84398° not 21°50'45'' so you have to convert it. Here you can find long/lat for most cities (and pop too):
http://www.geonames.org
The exact population is a bit useless anyway, because defcon will change the population so the sum of all city populations is 100 millions or whatever population is set to in defcon.
And all of the said is pretty obvious and you could have easiely figured out by yourself, if you just would have tried and used some common sense. But instead you asked a useless question, nobody can know the answer of.