Disabling Zip Drive Auto Eject Shutdown

I would like to disable Iomega’s autoeject command, i.e. my cartridge ejects when the PC is shutdown. Iomega support has said that I need to modify the system registry, however they will not tell me how. The system is a P90 desktop used as a teststation. If the operator forgets to reinstall the zip at powerup then testdata will not be backed up to the Zip. Thanks for your feedback!