Need help with making a master server

Hello, I started working on multiplayer for my game & ran into problems.
I have no idea what i'm doing since the new networking features of unity have been released.

I looked at http://forum.unity3d.com/threads/master-server-sample-project.331979/, but i don't know how to make a player spawn when they connect & it says lan only unless all hosts have public ip.

Here's a breakdown of what i would like to achieve/get help with.

I would like to have a server browser where all hosted servers are shown,
then from the server browser you can connect & join any server that has been listed,
When you join the server a prefab of the player spawns.
Position syncing through the network would be awesome.

That's the end of the breakdown.

Any help would be greatly appreciated,
Thanks for reading .
- Jabez

 

help!