Any file you download is a compressed Unix TAR file.
Assume the name of the file is "project.tar.Z". In the directory
where you download the file, create a subdirectory called "newproject"
(mkdir newproject). After the file has been downloaded, change the current
directory to "newproject" (cd newproject). Then execute the follwing
command:
"zcat ../project.tar.Z | tar xf - "