Dig two holes, each 1-foot deep and 6 feet apart, where you would like your privacy stick screen to go.
Insert a 7-foot-long stick into each hole, leaving 6 feet above-ground, and packing dirt around the base so that the stick is solidly in place.
Nail one 6-foot-long stick across the top of the two grounded sticks or use wire or twine to attach it. Nail the two remaining 6-foot-long sticks to the frame in a cross, so that they intersect at the middle of the frame.
Think of your privacy screen as having been divided into four sections by the cross sticks. Working on one section at a time, attach the shorter sticks going from each frame corner to its cross-section center, with wire or twine. Place the sticks as close together as possible.
Decorate your privacy fence regularly with hanging ornaments and strings that you can weave through the small cracks in the sticks.