Someone might have suggested this already (I didn't read the whole thread), but mabye she could try going to sleep again in the dream, with the expectation of having a normal dream?

Also, if you could get your friend to describe in detail what she experiences nightly (not including, of course, the content of the dreams themselves, just her experiences on falling asleep, waking up, entering and exiting dreaming etc), I think that the information would be very much appreciated by those of us who are still struggling to become like her, if it would not be too much trouble.