I thought I'd share this for current and future Zpacks owners as I've found it useful.
In an attempt to give myself a little more privacy in group settings and increased rain protection while still leaving the doors partially open for ventilations sake, I purchased 2 sets of Zpacks peel and stick toggles and mounted them midway up the downwind doors, in-line with the stock door toggles and the lower corner of the door. Now I can roll two of the doors half way up if I so desire. I've been in two decent downpours so far with at least one side of the tent set up like this, and was pleasantly surprised how well it worked.