How can I change my alternator belts?

Okay, it would help to know what engine size you have and what accessories you have. i.e. power steering etc. Usually all you have to do is loosen bolt 4 and bolt 7 in the diagram , push the alternator toward the engine block, You then take the belt and place it over the corresponding pulleys. I then usually take a hammer handle or a medium claw bar and gently move the alternator on the bracket away from the block until the belt is tight. Tighten bolt 4 and 7 and recheck the slack in the belt. The accessories and the engine size determine the routing and size of the belt. I hope this makes sense and does help you out.