Don't really know the mod and if it have something particulary weird, but usually you only need to import basefemalehead.nif or femalehands.nif, set then as reference (right click on the shape, set reference or either import it directly as reference, load reference, tick from file, but this will remove your actual reference that you may want to stay to have a clear idea of what you are doing) and copy bones from it.   You also may want (depending on the outfit, you'll need to make some