Trust me, I work for a PA program, there is no such thing as a Rn-MD program. Two totally different approaches to health care. Alot of our PA students eventually go to medical school though. Essentially rendering PA school a waste of money and time. PA school credits don't transfer to med school. The students still have to take the basic medical science courses (biochemistry, gross anat, microbiology, neuroanatomy, pharmacology) like all of the other students.
Tell your friend if she wants to be an MD, go ahead and apply to medical school.
For God's sake, there are medical schools
that admit students right out of high school, just to prepare them for the rigors of medical school. Med school is a completely different animal.