Hiya.
I use Hexagon as well (along with my other favorite apps, Softimage XSI, Painter, and UltimateUnwrap3d). Hexagon does have some pretty decetn UV unwraping tools, but I'm more comfortabel with UU3D, so that's what I use.
What you need to do is read up on general UV mapping. What it is, how it works, limitations, etc. There are a lot of good tutorials out there, here are two:
http://www.poopinmymouth.com/tutorial/tutorial.htm <-- the guy is REALLY good!
http://forum.daz3d.com/viewtopic.php?t=47257 <-- Hexagon spcific. Very helpful to understanding how Hexagon deals with UV mapping.
(PS: I've also posted this link for you at the Polyloop thread you started.

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