So my friend doesn't want his Warcraft 3 and W3 TFT anymore. Being the cheap ass I am, I asked him for it and he said yes, meaning I will get it sometime soon. Problem is you need a CD key. Can I just use the one he had since he won't use it anymore? We've played Starcraft against bots together on battlenet using the same key, but this time, I'm not looking to play with him.