Victory Conditions?

First let me say, I just bought the game, love it, trying my best to convert my friends.

Second, I apologize if this post is in the wrong place or has been covered before.

I was wondering if it was possible to change the victory conditions on a game?  Something like "victory by controlling key planets"  or "bringing so many colony ships to x planet"  instead of just the generic, wipe the other guy off the map.