Electroshock the egg. [For now, The Sheep Cloning Paper is probably a good reference for how much and how long to electroshock.] The electroshock induces the fusion of the two cells, so you should be able to tell when you've electroshocked enough just by looking at the cells. The rebooting of the human genetic program is believed to be initiated by the replacement of donor cell protien signals by egg cell protien signals, but the electroshock might assist in moving those protien signals across the nuclear membrane as well. Electroporation is a common technique for moving DNA molecules through a cellular membrane.
