Warning: This guide was written for imovie 06. Newer versions may not work.
Open iMovie and select the "Open Project..." command from the File menu. An "Open" dialog box will appear. Browse to your iMovie project file, select it and click the "Open" button.
From the File menu, select the "Share..." command. A dialog sheet will appear.
Select the "QuickTime" tab. Select "Expert Settings" from the "Compress movie for" drop-down menu. Click the "Share" button. A "Save exported file as..." dialog box will appear.
Select "Movie to DivX AVI" from the Export drop-down menu. Navigate to your desired output DivX® movie location. Press the "Options..." button to configure the DivX® encoder.
If you have a desired file size for your DivX® movie (e.g. 650MB for a CD), select the "Make a file(s) of MB in size" radio button. Enter the desired number of files you want into the first edit box (e.g. If you want to save the DivX® movie on two CDs, enter 2). Enter the desired file size into the second edit box.
If file size isn't important, leave "Make a quality file" checked. From the drop-down menu, select the desired quality for your DivX® movie. The default is a High quality file. Click the "OK" button to return to the "Save exported file as..." dialog box from Step 3.
Select the "Save" button to start the encoding process. During encoding, you can start the popcorn and prepare yourself for a DVD-quality DivX® movie experience. Play the file on your computer using any media player, but if you already own a DivX® Certified DVD player, you can enjoy a big screen, surround sound, movie theatre-like experience from the comfort of your favorite living room chair.