Quote - DPH, I don't like to disagree with you, since:

a) you know a lot more about mapping than me
b) you're a jolly nice chap

but... I think I can make this one fly. 

Tomorrow, I'm gonna have a play with UVM Pro and see if I can Frankenstein an approximation of what I mean.

I've no patent on remapping figures, but I will state this: Your concept has both merit and demerit!  While possibly facilitating texturing in the Pose Room, it'll destroy the facility of ease to Create new textures.  And ultimately, it has very little to recommend it above that which is already in currant use to texture V4.
dph

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