FYI, the HD20 is officially not compatible with System 7. Technically Apple dropped support for it under System 6. However, to my knowledge it still works just fine under System 6. AppleShare is perfectly compatible with System 6. Therefore you should create a System 6 startup disk, if 7 is not working for you, install the AppleShare client and it should work perfectly. As long as you are running a Mac with Plus era ROMs or better you should not need the HD20 Init. The ROM should be aware as should the System. i.e. I don't think they stripped the code out until System 7. Also, the HD20 is not supported under an SE/30 without a special INIT (not the HD20), and that's about the point where support for it breaks down in ROM and System.