You can use a deep 1/2 drive socket or a 12 point wrench to get it. If your socket still isn't deep enough to get to it, you can weld a small bar onto the end of it so it will allow the IPR nose to go inside the 1/2" drive.
No one sells an "IPR socket" though...
Ford book actually states you have to take the HPOP out to get to it, but that's not the case.
EDIT: I just saw this was for the 6.0 :doh:
I'm sorry..... carry on.