How do I change an alternator belt on a 98 Ford laser?

To change the alternator belt on a 1998 Ford Laser, first ensure the engine is off and cool. Loosen the tensioner bolt and adjust the tensioner to relieve tension on the belt. Remove the old belt by slipping it off the pulleys, then place the new belt around the pulleys in the correct routing. Finally, adjust the tensioner back to its original position, ensuring the belt has the proper tension, and tighten the tensioner bolt.