This page contains a selection Gregory Kramer's talks and guided meditations. These are in mp3 format, and are free to download.
To save the actual file to your computer, right click on the download link and select the 'save target as' option.
You will need a mp3 supporting audio player on your system. Itunes (OSX+PC), Winamp and Quintessential Player (PC) are a few of the many free options available.