Hahaha... guess what? If you have that old Mac sitting around, Apple has made available (for sometime already I assume) System 7.5.3 for free download here. I was just looking around for someone to give me the old OS to format an old powerbook 1400cs and got pointed there. Nice... too bad they have not posted OS8.1 yet. Although its buggier, 8.1 has a nicer touch to the interface. 7.5.3 is stable and simple... and the grouch works with it.