If Naika loads from the Props library and not the Pose library I would suspect it's a magnet set - in which case you need to tell the magnets to affect the clothing. That may well be what the Adj pose does, but such things can be very sensitive to the order in which they are done - if there isn't a readme with better instructions try loading V4, applying Naika, then loading one of the clothing items, applying the magnetise and Naika adj poses, selecting V4, loading the next piece of clothing, and again applying the magnetise and adj poses, and so on. As for the Walk Designer, I've not used it but I think you need to define the walk path - in your case presumably standing more-or-less in one spot - and it then applies the walk cycle along the path.I suspect you may be better off just using a straight walk cycle, rather than the Walk Designer, but I really am not an animator.