First you would need to isolate the basement zone from the upstairs by
redoing the plumbing. Next you have either 1 of 2 choices. Get the
solenoid valves and put them on each zone. Or get an extra circulator
pump and put it on the basement zone. You will also need a control box
to interface the basement thermostat to the new circulator pump.
You don't need valves on both supply and return sides. Just on the
supply side.