Just extract to your directory. If you downloaded the previous version, delete the previous CZDM.big and replace it with this new one.
Some unintentional things happened here.
-Overlord Paradrop(I didn't remember I did this, or not)
-Ion Missile with a causes a 'SEND IT FLYING' disposition(which was kinda funny seeing battle buses dropping from the sky.)
Still. Lots of Balancing.