Yes, I read the same: no custom styles area.
And I think KN don't read styles directly from floppy.
So, I don't understand the way to play external styles, nor how many styles may load into the keyboard, if so.
Really, this is the great desadvantage of KN comparing it with PSR2100. PSR may load 40 or more user styles, and afterwards, may play styles from flopy.