To Skyjob: My picture on the ND was not meant to be a stand-alone way of getting your engine out procedure correct, merely a reminder to get you in the right direction. The details of the exact routing have to be remembered.
Map shift? With modern aircraft with GPS updating, it would be a strange incident together with an engine failure. Anyway, it would be advertised in front of you. Would you not set it in the ND, cause you could have a map shift? Then also forget any normal departure, without engine failure. Or stay in bed. It is safer.