There seems to be a lot of confusion wether the newest firmware supports (v56 or v156) bitsetting or not.
I can tell you, it does!
Either you use the bundled Nero version 126.96.36.199 or the bitsetting tool provided with firmware 55b3 (didn’t test the one from 55b2, but it may work to).
I attached a picture so you can see where in Nero you can select the booktype.
Hope I could help some people in here,