My UV map's faces are really stretched and they are too much to do it alone by hand so, i need a relax tool.
Does the wings3D have got relax tool or anything similar to it?
If not are there plugins that i can install?
Thanks!
No, there is no relax tool for UVmapping in Wings3d.
Many times the problem come from the way you cut the "islands"; sometimes from the intricate geometry.
I already read here that one used
UVMapper for that. You need to export your model from Wings3d using the
Wavefront .obj format.
There is an useful tutorial (in two parts) about UVMapping using Wings3D tool that worth your time - watch them

:
UV mapping in Wings3d.
ok, i will check that
thanks Micheus!
In AutoUV window, you can try to fix those stretched areas by selecting apropriated elements and use Vertex|Tighten and/or Edge|Circularise. In many cases, those commands help a lot.
It is good to see you back around Fonte Boa ... hope all is well.
Another good feature, is when you find yourself with these troubled areas, cut them out and then, on the new islands, you use Remap UV>Project Normal/Unfold (Depending on what you need). You could then restitch afterwards. I've had this produce good results in the past.