I've just bought a computer—complete with bundled Works Suite 2003 software—for a client. The Works Suite installation disks are present, but the CD-keys are missing - making re-installation almost impossible. Fortunately, there's a solution:
ProduKey is a small utility that displays the ProductID and the CD-Key of Microsoft Office (Microsoft Office 2003, Microsoft Office 2007), Windows (Including Windows 7 and Windows Vista), Exchange Server, and SQL Server installed on your computer.
Another option is to use Belarc Advisor