Excuse my ignorance, but googling "poser walk designer" I found some products by Nerd3D which supposedly introduce new walk cycles for the DAZ figures into Walk Designer. It seems to me that that's exactly what we would need to do: create a number walk cycles specifically designed for Antonia's rig and convince Walk Designer to use those. Now to find out how to do that kind of thing...

-- I'm not mad at you, just Westphalian.