[R] Installing packages from ZIP files

[Richard A. O'Keefe]

I have R 1.9.0 running under Solaris 2.9 ona  SunBlade 100, and am
very happy with it.  I heard about the stuff at www.rmetrics.org and
thought it might be worth looking at.  However, what I found there is
a bunch of .zip files.  The entry page suggests that there is some
way to install packages from .zip files in R, but I have searched all
the documentation I have and cannot find it.

_Is_ there a way to install a package from a local .zip file in
R 1.9.0 for Unix, and if so, what is it?