There are 2 types of files that have to be provided in a compressed form; and these, must be within a folder that you create with the following names: IMAGES, and AUDIO. Once the 2 folders, with their respective files are ready, they will have to be compressed using compression software like: "WinZip" or "Stuffit" for Windows; "Stuffit" or "Create Archive" (Mac OSX) for Macintosh.

If you do not have any of these applications, click the following links to download them for free:

For Windows use the software "JustZIPit"
http://avatarsoft.com/free/data/apps/JustZIPit.exe or "WinZip" http://www.winzip.com/downwzeval.htm

For Mac OS 9 use the software "MacZip"
http://mac.softpedia.com/progDownload/MacZip-cb-Download-5152.html

Note: The application "MacZip" will download in ".sit" format. You just have to double click on the "MacZip" icon to automatically expand it; or look for the application "Stuffit Expander" on the Mac OS 9 application folder.. If by any chance you do not have the "Stuffit Expander" application in the Mac OS 9 application folder, you can download it from this link: http://www.stuffit.com/cgi-bin/stuffit_loginpage.cgi?standardmacexp. Only follow the step 3 of this page

In the case of Mac OS X, on the "Finder", you can look at "File" / "Create Archive". All you must do in this case is to select the folder that you want to compress and from the menu of the "Finder" choose the option mentioned before. It will create a compressed file in the "desktop", with the original name with the extension:".zip".