Screen shot of installer's welcome message.

You can easily add a custom panel which requests additional information from the user and then save that data to disk or use it in the installer. The custom class which generated this panel only took about 200 lines of code, including comments.

Or, if you simply need to perform special tasks during the installation, you can do that, too. You have the full java runtime library plus and extensive API available. We include dozens of examples, too.