I want to play a game of Heroes of Might & Magic 5 : Tribes of the East online with some friends. One of them has a downloaded copy of the game so doesn't have a serial key. Due to this, we can't play on Ubi.com If we all installed / configured Hamachi, would this allow online play without needing the key? I've not played a game over a LAN in many a year so not sure if it will need it or not. I know you can play offline without the key.