I agree with moondog. I've only just discovered the joys of wings3D.
I sat down at the weekend to learn to use it's uv mapping tool and found it to be, like its modeling tools, very easy to use and produce excellent results.
I've used lithunwrap and like it but its no where near as good as the wings uv mapping tool (of course, IMHO). Also lithunwrap detatches all the vertices when unwrapping, so if you do use it make sure you re-weld all verts in your modeling package.
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