The pathname to a launched file?

[brunk@ics.uci.edu (Cliff Brunk)]

Is there a way of getting the pathname to the directory holding the document
that was double clicked on to launch MCL?  In MCL 1.3.2 it was the case that
"home;" was set to this directory.  The manual indicates that this should be
the case under 2.0 as well. However when I launch MCL 2.0 by double clicking
on a .lisp or .fasl file  "home;" is set to the directory containing MCL 2.0
not to the directory containing the launched file.