You've read these two threads, I assume:
http://www.inivis.com/forum/showthread.php?t=6657
http://www.inivis.com/forum/showthread.php?t=6666
I've had better luck with LSCM by doing the surfaces in passes. That is, trying to make sure my surfaces can be folded out flat by omitting surfaces to make seams, or unwelding vertexes to make seams.
Some method of pinning is needed, too.
Ron