The best way to go about this might be to see if theres a way to completely load a new obj into a figure. Since the uvmap comes along with the obj, that might 'trick" poser into using a new uv map.

If the only change to the figure is just uv maping, everything else should work properly, I'd think.

I did ask SM for this as a feature enhancement last year, when I saw the benefit of it to a figure like genesis, with extreme body morphs that would distort textures. No idea is thats on their to do list at all, or if it was forgotten.

Way too many people take way too many things way too seriously.