  Given a weight-one element $u$ of a vertex operator algebra $V$, we construct
an automorphism of the category of generalized $g$-twisted modules for
automorphisms $g$ of $V$ fixing $u$. We apply this construction to the case
that $V$ is an affine vertex operator algebra to obtain explicit results on
these automorphisms of categories. In particular, we give explicit
constructions of certain generalized twisted modules from generalized twisted
modules associated to diagram automorphisms of finite-dimensional simple Lie
algebras and generalized (untwisted) modules.
