Page 2 of the Frequently Asked Questions About Final Cut Express 2.0 document incorrectly includes the following information that applied to the original version of Final Cut Express.
How can I prevent out-of-sync audio on long clips?
Make sure that the "Sync Adjust Movies Over...Minutes" setting is enabled in Preferences. Then, delete the clips that are out of sync and reimport them.
This is not an option in Final Cut Express 2.0 preferences.