Hi David, both files are in tar format - just find a program that opens tar files. I think WinRar does, you can also try 7zip.
On a Unix system it is possible to use following commands
url>tar xvf somefile.tar
Also those archives might be zipped and the extensions usually are:
.tgz in that case the command to extract will have an extra "z" parameter (unzip)
tar xvfz somefile.tar.gz
tar xvfz somefile.tgz