To download and unzip the files on iPad, I suggest you use the Goodreader App. Or use a computer to download the files then transfer them to your iPad. To download using Goodreader, click the icon: 
. Otherwise, on a computer click the download link. These are BIG files, some over 1GB. Be patient while they load.
. Otherwise, on a computer click the download link. These are BIG files, some over 1GB. Be patient while they load.