Gettin them out svrewdriver but getting them in I made a simple device out of bits and bobs cause I didn't want to hammer about with my flights..
I use it for bottom brackets and headsets. You need a long threaded bolt that has thread al the way down it or nearly all the way. If you imagine a stem bolt but with thread all the way down it. then you need two big washers or bits of metal (bigger than cups you are trying to get into frame) with holes in the size of the bolt to go through the middle. Very simply washer or metal plate on one end slide through headset cup, through head tube, through other cup on other side, put other washer and nut on then tighten. Cups will be in place without damage.
If you want a pic let me know.