If you still have your previous System Folder on your hard drive, follow these steps to resolve the issue:
2. Open the Help folder.
3. Drag the iMovie Help folder to the desktop. Close all windows.
4. Open the System Folder on your hard drive.
5. Drag the iMovie Help folder to the Help folder inside. Close all windows.
If you don't have your previous System Folder, follow these steps to resolve the issue:
2. Locate and open the Software Installers folder in the iMovie CD window.
3. Open the iMovie folder.
4. Open the iMovie Help.img document to mount the disk image.
5. When the iMovie Help disk mounts, open it, and open the System Folder inside.
6. Open the Help folder, and drag the iMovie Help folder inside to the desktop. Close all windows.
7. Open the System Folder on your hard drive, and drag the iMovie Help from the desktop to the Help Folder inside the System Folder. Close all windows.
Again, when you select the Help Center, you should now see a link for iMovie Help. When you open iMovie, you should be able to open iMovie Help from the Help menu.
If you are experiencing trouble opening the Help Viewer, please see article 31030: "Mac OS 8.6: Apple Help Viewer 1.2.1 Fails to Open"