It is easiest to create thermostats that have your desired heating and cooling schedules and then assign the thermostats to zones while in SketchUp:
If most all of your zones have the same thermostat you can also use the "Set Thermostat Schedules" script (best to use in OS by using the apply measure now function). This script will assign all zones to a single thermostat, and then you can go change any zones that you want a different thermostat in.
Script is located here: Set Thermostat Schedules
Also, you can edit the script to assign a thermostat to only zones of a certain space type for example.