its depending what is the computer are u using. if its Mac try this
01. If you can get recoverd the old hard drive.try to mount it from Disk utility(Applications-Utilities) or Mac Os DVD. after that locate the preferences file belong to filemaker.(Location : User(home folder) Library/ Preferences
02.Copy all the preferences .
03. put it to your Mac agin .
But for the Windows i dont Know
***** Dont Copy all the preferences**********
Locate the FMP prefereces from that Folder
Contact FileMaker support. They can deactivate those activation keys for you if necessary.
I've had to do it a couple times, because of dead drives.