Currently Being ModeratedFeb 27, 2013 10:28 AM (in response to Mike339)
If you're reformatting the hard drive, just reinstall the OS, then reinstall the apps. There should be no problem entering your FCE serial number. There's no need to "free up" any product key.
Currently Being ModeratedFeb 28, 2013 11:57 AM (in response to Mike339)
Something else to consider if you're going to wipe your disk - that is using Disk Utility to make back ups of your install and content disks - saving them on a backup drive. Insurance against damaged disks and the next installation will be much faster.