Put on the safety goggles.
Cut the plywood into panels with the saw. These panels should be 24.5 inches by 48 inches.
Drill four 11/16-inch holes in each panel, 8 inches from each side panel, 7/16 inch and 1 9/16 inches from the top, respectively. When you're finished they should be arranged like two colons that are 32 inches apart from one another.
Push a screw through the holes in each rope hook, then through the new holes in the wood and hand-tighten until the hooks are securely fastened. Whichever side of the panel the hooks are going "up and over" will be the back of the panel.
Place the panel on a flat surface face-down, with the hooks pointing toward you. Place the fiberglass insulation panel on top of the wood panel.
Push four nails through washers, and use a hammer to drive the nails through the fiberglass panel and into the wood panel. Try to nail using a zig-zag pattern, such that the nails form a parallelogram instead of a rectangle. This way the nails won't collide when you are nailing a fiberglass panel to the reverse side.
Flip the panel over and nail on another fiberglass panel. Use forceful and focused hammer blows so you don't bend the nails.
Place the polyester batting over the front of the wood and fiberglass assembly, such that there are about 5 inches of batting protruding beyond the edge with the hooks, and an equal amount protruding off each side. Run your hand over the top edge of the assembly, smoothing the batting down against the panel until it sticks.
Lift the whole assembly carefully by its side edges, flip it over, and set it back down such that the back of the assembly is now facing you. There should be a lot of batting protruding from underneath the bottom edge of the assembly.
Lift the batting protruding from underneath the assembly up and over the back of the assembly, and smooth the batting down against the top edge such that it overlaps the batting already smoothed against the top edge.
Trim the batting on the top and side edges with a pair of scissors, such that each flap can be folded down without extending past the opposite side of the assembly.
Place the fabric cover over the panel, such that there is an equal amount protruding off all four sides. In other words, the assembly should be centered under the fabric.
Lift the whole assembly carefully by its edges and balance it on its side edge. Try to have the plywood bear the weight, as the fiberglass insulation can come off rather easily.
Trim with scissors the fabric that is protruding past the edge that is up in the air, such that when the flap is folded over the side edge, it extends to about an inch short of the opposite side.
Staple the fabric to the edge of the plywood. Try to maintain equal tension between staples on the side edge. If the fabric has a visible weave, try to keep the weave parallel to the edge of the panel, skewing the fabric slightly if necessary.
Lift the whole assembly carefully by the edges, rotate it such that it is resting on its other edge, and lift the fabric up such that it wraps completely around the assembly. Trim the fabric with scissors so that it extends to about an inch short of the other side, then fold the fabric under about half an inch, and staple it to the plywood. These staples will be visible on the finished baffle, so make them neat.
Lift the whole assembly carefully by the edges, rotate it such that it is resting on its top edge (with hooks), and use the scissors to trim the fabric on the bottom edge to a similar length as you trimmed the other edges.
Fold the fabric on the bottom edge down, just as you would when wrapping a gift. Push the fabric in from the sides, then fold in the flap protruding from the back, then fold in the flap protruding from the front. Use heavy duty staples to staple this fabric in place neatly.
Lift the whole assembly carefully by the edges and rotate it such that it is resting on its bottom edge, which you just stapled.
Poke some holes in each flap protruding from the top with the scissors, and push the hooks through those holes such that they protrude from the fabric when the fabric is folded down.
Fold the fabric down over the top edge like wrapping a gift, similar to how you folded the flaps over the bottom edge. Use heavy duty staples to staple the fabric in place.