After you have downloaded or in some other way obtained a installation package Executable JAR file and you have stored it in a folder on your hard-drive, you should have a JAR file:

The file jwtools.jar is a executable JAR file, meaning that you can double click on it, in the Explorer window (or another disk navigator on your OS). iInstall Reborn Installer will start up and show it first screen:

To navigate iInstall Reborn Installer you use the buttons on the screen. Depending on the screen displayed to you, an action can be required in order for the ‘Next >’ button to become active.