Let me tell you it's not fun unlocking a faction yourself when it's already done (I'm not going to go in to what you have to do to get the LOS working without scripts).

Here:

The mod to play all factions: http://www.twcenter.net/forums/showthread.php?t=288139

The tutorial to do it yourself (which is an enormous amount of work): http://www.twcenter.net/forums/showthread.php?t=272139