> >Then what'll happen when I install 'doc' of 'arc-5.21e' after
 > >installing 'core' of that? (or is it possible?) If we do this, we have
 > >to edit some under /var/log/arc-5.21e. These files and package
 > >database be dynamic. It seems very confusing to me, at least beyond my
 > >imagination. ;-)
 > 
 > 	i assumed you can't install arc-5.21e (doc) when you already have
 > 	arc-5.21e (core).   you need to pkg_delete then pkg_add.
 > 	(but it is under my imagination so not sure about takemura-san's idea)

You should do pkg_delete and pkg_add with my first implementation.

Takemura