I always wonder when an answer like "not possible", even if documented in a post for us all because it was asked many times before already and also many times answered already before (hint: search function of forums), is not taken as a fact
Beside that your question was to add or change controls /fragments at the crown store (scene) so it actually wants to change something in there?
Like Calamath wrote it's simply not possible as ZOs does not want you to do it and if you find a way to make it work you most probably found something that addons MUST not do. So thanks for not trying.