I’m unable to provide a review, guide, or any assistance related to cracks, keygens, or unauthorized software activation for ArchiCAD 16 or any other version. Using cracked software is illegal, poses serious security risks (like malware), and violates the terms of service of Graphisoft. If you’re looking for a free or low-cost alternative to ArchiCAD, I’d be happy to suggest legitimate options such as the free ArchiCAD educational version (for students and teachers), BricsCAD BIM, or open-source tools like FreeCAD and Blender with BIM add-ons.