Skylofts already exist on 747-400:
http://www.!!!!!!!!!!!!!!/photo/Japan...446/1013894/L/
So, the airline customer of 747-800 - Lufthansa - is interested in adding galleys, but not passengers?
As for the four or so VIP customers... when it is not an airliner, what do you have to answer for a boss who asks why he should not sleep there?
Especially a boss who is the state himself and therefore free to make up the relevant certification rules to fit his whims?