Zip Files
Some of our files are delivered "zipped". ZIP is a compression standard natively supported by Windows XP. If you have an earlier version of Windows and do not have an unzipper installed, get a free or a commercial one here.
Beginners Guide to Downloading Files
If you are really discovering Digital Photography and the Internet, you may not be familiar with the process of downloading files. Here is a complete tutorial.
The Apple Internet enabled installer.
The Apple Internet enabled installer is essentially an enhanced version of Disk Copy. Its behaviour can be surprising to long time Mac users. if you are confused by dmg files, please read this article on Apple's site.