Thanks all, I have a lot better insight into what's what after reading the comments here :-)

Sounds good then.  I'm pleased there's something common to both programs, and while I doubt I'd actually vend one product for two programs, at least V4.2 works properly in both, and that means making stuff for her is at least a reality for me.  I can send V4.2 from PP2012 using GoZ and I don't have any issues.  Sadly I cannot do the same for Roxie because she has that new mapping stuff and PP2012 doesn't support it.

I haven't started on anything yet, but if we don't get a heavy sale on Poser Pro upgrades very soon, I'll just have to ditch the Roxie idea unless/until they fix the Morph Brush Mirror in Poser 10.