Enabling surgeon-educators to create VR-training units promises greater variety, specialization and relevance of the units. It allows implementing variation in technique, an important component of traditional surgical education, and to create uncommon and specialized scenarios. We report on a web-based authoring interface that allows surgeon-educators to assemble simulation-ready pieces of VR anatomy and tools to quickly specify new surgical scenarios. This interface has successfully been used by surgeoneducators to create laparoscopic training units for appendectomy, cholecystectomy and adrenalectomy.