Thanks for the input, folks!

DPHoadley...sorry to hear about your remapping woes.  I saw your threads and was secretly cheering you on!  "Eve" and "Latexa" used to be my favorite Posette variations until Pitklad came along and fixed Posette's eyebrows for good with NEA!

Puddykat...GIRL's head on Aiko would be freaking AWESOME!!  Best part...no remapping needed for either to take V3 textures!  Help us, stahlratte!!! ;)

I also appreciate the Shapeshifter suggestions.  Maybe I've been doing something wrong with it, but when I try copying Vicky's head to Aiko, I get a kind of nasty bulge around the neck join that I've had absolutely no luck getting rid of.  The way I get Vicky's head on Aiko now involves exporting Vicky's head as an .OBJ and importing it into Aiko as a morph.  I don't remember who originally posted here how to do this, but a forum search should show the thread, if you're interested...

Thanks, everyone, for your help!