Cool, I'll definitely be checking out the new Antonia later.  Gotta take off for a few hours and no time now though.
Thanks, Olaf. :-)

Laurie, I'd suspect that morphs made in Poser will be more likely work with Split Morph because Poser is using its own internal measurements to figure it out. It's probably doing like Zbrush and mirroring across the X in terms of distance from 0 on the X axis, as opposed to mirroring explicit vertex translations like modeling programs do.