Much of the information still holds. You'll need a spinnaker halyard, two sheets - one for each clew, sheet blocks at/near the stern. In addition, you'll need a ring mounted on the front of the mast for pole attachment; preferably one with an adjustable car. Check the Catalina Direct site - Capri 22 section. They have a kit that includes a track, mounting hardware and adjustable car. You could get away with a fixed ring if mounted at about the correct height. Also, you'll need a pole topping lift which is like a mini halyard that is run from about where the spreaders are and a down haul to keep the pole from "skying".
Plunder around those sites that were linked and you'll find information about how they all work together.