You didn't really have to unzip the patch. Downloading the patch would have been enough for it to take effect.
Ummm... If you don't install the patch, how can it take effect?
The key for the big doors is given to you by the Bee Queen. Try just clicking on the door and see if it opens (despite it saying [color:"red"]Locked[/color]). I never found a key for the last gold jug either, and I had one gold key spare.
Also, is Divine II out already?
RiftRunner is due out in the next few months.
Divine Divinity 2 won't be out until the end of next year.
Welcome and enjoy!