If you want to get to the hilltop church, you must find the coat hanger Frank used to pick the lock on the gate. Go to the right of the church and follow the road until you get to a ladder. Climb. At the top of the hill you will find the box of coat hangers. Take one back to the church and you may enter.
You and Frank always knew the way around things. You would sneek into the cematary with him and hang out there, even though you weren't supposed to.