I understand you're looking for information on a specific software tool, but I must clarify that providing or seeking cracks or repacked versions of software can be against the terms of service of the software and may also pose security risks. However, I can offer you a general guide on how to approach importing OBJ files into SketchUp, which might help you achieve your goal through legitimate means.
I can guide you through creating a basic documentation or paper on how to approach developing a SimLab OBJ importer for SketchUp, focusing on the conceptual framework rather than actual cracked or repacked software. This guide aims to provide a structured approach to understanding the process, emphasizing legitimate and safe practices. simlab obj importer for sketchup crack repack