The README.5 file for the GRASS 4.1 Release 5 has the following command for
unpacking the archive file:
zcat fname.Z | (cd [destination]; cpio -icdu)
I think this will give you the results you want.
Michael Hanratty Phone: (612) 627-4590
Dept. of Civil Engineering (612) 626-0024
University of Minnesota Fax: (612) 627-4609
St. Anthony Falls Laboratory
Mississippi River at 3rd Ave SE
Minneapolis, MN 55414