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

wget <some url>
url> #where <some url> will be something like http://...
tar xvf somefile.tar

Also those archives might be zipped and the extensions usually are: .gz or .tgz in that case the command to extract will have an extra "z" parameter (unzip)

tar xvfz somefile.tar.gz

or

tar xvfz somefile.tgz