ND hit it on the head....no program will probably ever be able to interpolate UV positions perfectly, there will always be some manual tweaking. I have Roadkill but havent tried it yet as I am comfortable with Maya for the moment...as like ND and dave..I manually position anyways.
cheers bullet
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes