Screw in small screws to hang your pictures on. Remove the tape, patch any little spalls if necessary, touch up paint, and hang the picture. You will break and dull out many little drill bits. At best it is time consuming and can be frustrating. That old plaster is like a rock.
Any success is cause for celebration.
When our house was constructed, they must have thought the ground line would run further up in front of the porch than it does. The front of the porch has about 6 inches of finished cement and below that is about a foot of unfinihed cement, and a really messy line of dried dripping cement in the middle. I have asked a number of people for recommendations. I am told that there is nothing I can use to finish-off the unfinished part because nothing will stick to the cement. I was thinking of something like a stucco or cement-type product that I could apply to make it look more finished.