I just did this as well as my alternator. Sounds like your pretty mechnacialy inclined, so sounds like you already know what you need to do.
Well if you are questionable, here is a little insite. Just unhook ps fluid resevior over to the right, leaving hoes' attached. 0nly loosen the two top bolts that are into a small bracket which is the tentioner mechanism. If I remember correctly, if that is loose enough, you should be able angle the pulley enough to get the new belt on and then tighten it back up. If this is not, so loosen the bottom bolt, uncrew them and slide it down to get the belt on.
Remember, when doing the tension do NOT put it too tight. Just estimate for a little over 1/2" of play in the tautness. Should only take you about 20 mins max. Have fun!