fpr
#2
Very easy. Just make sure you put a rag over the FPR before you pull it out or you might get sprayed in the face with fuel if there is pressure in the rail. Putting in a new one is very simple, just pop it in and put the pin back in place.
#3
If you start the car and then pull the fuel pump fuse and wait for it to stall out, you wont have any worries about getting sprayed. Just dont damage the o-ring putting the new one in or you will leak