Center the carpet. Allow 6 inches of the carpeting to creep up the sides of the walls. Press the carpeting down to the area where the wall meets the floor. Use a utility knife to cut the carpet in long strips. Keep the pieces as carpet remnants.
Choose the corner in which you would like start. Place a knee kicker 1 foot from the wall. Allow the teeth of the knee kicker to grasp on to the carpeting. Push your knee into the head of the knee kicker, so that it pushes the carpeting into the teeth of the tackless strips. Move the knee kicker to the adjoining wall at the same corner and attach that side.
Walk the knee kicker to the opposite corner of the attached wall. Continue to press the knee kicker so it attached the carpet. Place the power stretcher 6 inches from the wall in the corner that was first attached. Adjust the power head to the deepest setting. Extend the shaft length to the opposite side of the room's dimensions. The power stretcher will use the other wall as leverage to stretch out the carpet.
Press the lever of the power stretcher. The teeth of the power stretcher will push out the carpeting. Press your hand down on the carpet so it is firmly attached to the tackless strips. Move the power stretcher over 2 feet and attach the carpet the same way.
Move along the wall with the power stretcher. Attach small areas or closets just with the knee kicker. Vacuum the flooring to fluff up the carpeting.