AgentSmith...
I believe buried deep within the recesses of all of my freeware compilation disks (that I have been archiving since 2002), I have several incarnations of UV MAPPER.
I never quite got the hang of using it to any practical degree - HOWEVER - it mifght be worth it to me to download the last V and give a shot at walking down memory lane a few more times.

What I don't get is how to get a texture map with multiple pieces to translate in BRYCE - although I do recall older tutorials on getting Poser textures to work in bryce, so that might be very related to what we're talking about. I've found the simpler tools in Bryce served my needs amicably so I found myself inquiring about advanced techniques only on the rare occasions when I really wanted to learn to do something for a special effect that was unusual and could not generally be done through "cookie cutter" plain Jane default functions.