Inno Key Generator 1.0

Inno Key Generator is a freeware application that enables users of Inno Setup to require registration credentials before installation can be completed. The download includes a key generator, validation DLL, help file, and sample script.

If you're a user of Inno Setup then this freeware application will allow you to force users to enter their registration credentials before the installation can proceed.
The download includes a key generator, validation DLL for inclusion in your scripts, a help file and sample script (actually the same script used for the installation of IKG itself).