How do you changa altternet belt on 01 Picasso?

To change the alternator belt on a 2001 Citroën Picasso, first ensure the engine is cool and disconnect the battery. Remove the belt cover if necessary, then loosen the tensioner pulley to relieve tension on the belt. Slide the old belt off the pulleys and replace it with the new one, ensuring it follows the correct routing. Finally, re-tighten the tensioner, replace any covers, and reconnect the battery.