> So can this be extended to movie-plot-like memories be wiped, or false memories implanted? How did they identify the memories to be targeted and where they were stored?

The same group has done all that stuff with optogenetics and molecular techniques:

http://tonegawalab.mit.edu/wp-content/uploads/2014/06/296_Li...

http://tonegawalab.mit.edu/wp-content/uploads/2014/06/297_Ra...

http://tonegawalab.mit.edu/wp-content/uploads/2014/06/289_li...