The UV Editor
This tutorial explains how to edit the UV Coordinates using Nifskope. This is helpful for fixing nibor stretches or such little issues.
1. Double-click your .nif file to open it with Nifskope.
2. Right-click the model.
3. Select Texture > Edit UV.
4. You can select UV Coordinates by keeping the right mouse button pressed and dragging the mouse around. Pressing Shift allows you to add more coordinates to your selection.
5. Move the cursor about one of the selected coordinates. If the cursor becomes a had, right-click it and drag it. 6. Close the UV Editor.
7. Don't forget to save!