I dunno... I'm willing to bet there's a piece of the puzzle missing here, rather than a program problem. I've imported tons of Poser content into Carrara, and I've never had a UV problem. And, I've never had a UV problem going from Wings to Poser or POV-Ray, so I don't think it's Wings, either.

Gonna go spend some more time with the ol' manual, and try to figger this one out.