The InstallShield Wizard is a software utility used by developers to package and install games on Windows. For Resident Evil 4, it manages the extraction of game files, the registry setup, and the critical CD key verification process. Where to Find Your Resident Evil 4 CD Key
Without the actual Wizard, you will likely need a No-CD crack (legally only for your own physical backup) because SafeDisc will block execution. Resident Evil 4 Cd Key Installshield Wizard