1. disconnect the negative battery cable.
2. remove the radiator fan assembly ( 1 wire plug, 2 metal clips and wiggle it up through the hoses )
3. remove the serpentine belt ( 17mm socket for the tensioner extruded 'boss' )
4. remove the plastic belly pan.
5. remove the wiring from the rear of the alternator.
6. remove the bolts mounting the alternator and remove it out the bottom ( you will need a Torx socket set, don't remember the bolt size ).
7. reverse the steps to install the new one.