Found a copy of System 3.3. Got the EasyShare INIT to load with it, but seemed unstable. My Mac 512Ke bombed a couple of times when copying files to it. Under System 4.1, it's rock solid.

Tried the System 3.3/EasyShare disk image on a Mac 128Ke version of Mac Mini. While it crashes after the desktop appears, when I slowed down the speed of the emulation and watched it boot, the EasyShare INIT doesn't load. Line through it. It seems that the EasyShare INIT does a RAM check during boot. and 128k isn't enough.