If you want a free dedicated texture mapping tool (skinning etc.) then try to get the latest version of "LithUnwrap". (guess it was V. 1.3). After that it became UltimateUnwrap3D, that is much better, of course, but also no longer freeware.
Grab a few beginner tutorials on "Lithy" and learn to use the power of it.
Grab a few beginner tutorials on "Lithy" and learn to use the power of it.