Thanks for the explanations, Les and Olaf. :-)

I do understand now what you all are talking about, although I really wouldn't know where to begin.
Which seams would be affected? Which would have to move over and how would I know?

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As I said before, the high-poly Antonia is just the first sub-d step of the low-res one. Antonia was developed with sub-d in mind, and I've only subdivided her for use in Poser because Poser can't do sub-d and thus doesn't render the low-poly version correctly in closeups. If we had a mapping for the low-poly version that had been made with sub-d in mind, that would probably be ideal. Then again, I did my original mapping on the high-res mesh and then adapted it to the low-res one, and that didn't seem too bad.

OK, now that is something I wish now I'd thought of before. I hadn't even looked at the lo res Antonia, and I never even questioned how the two related to each other. So high Antonia is simply low Antonia, subdivided once. Makes perfect sense now.

Suddenly I think it would in fact be a better idea if I simply started it over, working with the low res version and doing it Sub-D style. There are a few things I'm not satisfied with in the current version I did, anyway.
So a set of UV's made for low Antonia, with Sub-D in mind, would then work just as well on high Antonia.
That actually seems considerably easier to me than adjusting what I already did to work on low Antonia, less tedious at least.
And in either event, it would seem that either way would mess up any textures anyone may already be making, so I suppose I might as well...

So anybody reading this and making textures for my UV version, you might want to stop right now. ;-)

Although it's very likely that the next version will be very similar to the current version, so any existing textures might not have to be completely redone.

I'm also going to make that one-map-no-overlapping version too, for Low Antonia. I'll probably do that first, as it will give me a feel for the topology and will actually be a pretty quick and simple thing to do.