No press needed. It just bolts to the damper. there are 6 x 1/2 hex on the bolt circle and sometimes you have to remove the crank bolt and washer if they overlap. then whack it a few good times with a rubber hammer and it will come off.
The hardest part is lining up the bolt pattern when installing it. some have an offset bolt pattern and you have to see if it is lined up correctly. You have to get the right line of sight to do it in the car, but it can be done.
The alt pulley is press fit. I buy alternators with the right pulley instead of having to change it.