Had the same problem first when I thought I only need the zip-file. But you have to download all four files, the z01, z02, z03 too.! So you get a data amount of nealy 4GB. Make sure all four files are in the same folder on your hd. Then extract only the zip-file. It will grab the other stuff automatically. I use the Software "7zip" because it nearly copes with anything and has neat rightclick options.
