@FlyffDev youre almost right.
This is how its ment to be.
If you and your friends whant to play keep this in mind 85% of the routers cant back route outgoing to incomming connection.
So this is how its done.
AccountServer.ini
Set there your ISP IP-Address if you dont know what it is
www.watismyip.com
Then go to loginServer.ini and change the AddCache to match your ISP-IP.
Run the servers
Open Neuz.exe with Res hacker and change IP and Port there to mach your ISP and your Port in CacheServer.ini
Now distrubute your Neuz/Client to friends.
If you cant connect you need to change your neuz to have the IP of localhost so 127.0.0.1.
So your friends are using your ISP IP and you are using LocalHost IP.
BTW. Neuz.ini is self made by the Neuz.exe no need to download it.
Remove it and Neuz.exe will make one for you.