Hi Dan,
Some people have used SmartLighting (smartapp dedicated for Lighting) to control somehow the vents.
I personally don’t know how they do it as controlling the vents should be based on different temp/motion/thermostat mode/ST hello mode and other parameter readings in real time in order to reach maximum efficiency.
If you’re lazy (as you said), you can contribute to one of my support packages (they sell as low as $3/month), and I will set you up (initial setup) and update the code for you (based on a contribution to one of my zoned heating/cooling solutions).
See this thread for more details:
My zoned heating/cooling solutions are available at my store:
http://www.ecomatiqhomes.com/store
Regards.