napabar, I'm not set up to test anything on a stock 512K right now, but I can tell you that Mini vMac is incompatible with the HD20 INIT. You did not mention that before. As near as Paul Pratt and I can figure, the HD20 INIT is making some kind of call for the real disk drive, causing the system to crash since the emulated driver does not know what to do with it. This is unlikely to be fixed as Paul rightly asserts, the 128K ROM solves any problem one might need the HD20 INIT to handle.

Not entirely sure what EasyShare has to do with the HD20 INIT, though. Is it a requirement of Easy Share?