Lazarus Registration is new and improved, with more secure keys, a web registration module that can be integrated with your online store (written in PHP), and a working example installer. The demo component is free. The commercial version includes full source code.
The commercial version of the Lazarus Registration Component generates a custom registration component for each package you create. Your secret code is embedded directly in the DLL, keeping it from prying eyes that want to decompile your installer and release rip-off versions (trust me, it's happened).
You can download the demo version below, which will let you try out the tool to see if it meets your needs. If you have questions you can take them to the support forum.
Demo Serial Number: demo
Demo Registration Key: 67JE-K7RC-7JPT-Z6P4