The serpentine belt adjustment is at the power steering pump. You loosen the two mounting bolts on the front and the two bolts on the back then turn the adjusting bolt which is underneath the right side of the pump as you face it, to loosen the tension on the belt.
For good pics of the alternator removal go to
www.autozone.com.
Once there, choose your vehicle and follow the prompts untill you have the correct info in. When you get to vehicle conformation if it's correct click
"continue".
select "repair info"
select "vehicle repair guides"
select "engine electrical"
select "charging system"
select "alternator"
Scroll down and you will see pics showing all the mounting bolts which must be removed.