It is a very simple job to do. Make sure you have a 1/2" drive rachet or breaker bar. If you still have the sticker that shows the drive belt routing on or near the top radiator shroud you are good to go. Just make sure you get the proper belt. Use your vin number if you are unsure when you go get it.
1. use the rachet and pull back on the idler pulley. there is a slot for it
2. while holding the pulley back, remove the belt off one of the other pulleys.
3. release your hold on the idler pulley, and remove the belt all the way.
4. go in reverse order and you are done.