1. Open the Finder and look for the package
2. Right click the package and select 'Show Package Contents'
3. Keep the Finder window open
4. Go into the Mozy Preferences, open System Preferences and click 'MozyHome' or 'MozyPro' under 'Other'
5. Go to the 'Files & Folders' tab and click 'Advanced'
6. With both windows, the Mozy preferences and the Finder with content of the package next to each other, drag and drop the folder you wish to backup from the Finder to the Mozy preferences window under 'Back up'
7. Once the folder added to backup, click 'Ok'
This will mark the package with a yellow dot under the 'Files & Folders' tab however you still won't be able to see the content of it.
You may have to close and reopen the Mozy preferences to see the changes.