Yes, the adapters are apparently very hard to find, so you probably won't be using PC cards... OS 8.1 should work well with 20 MB memory, I tried installing it on mine once but it refused because I have only 8 MB and apparently 12 MB is required as a minimum, though 7.6.1 should be lighter if you'd rather go for older but slightly faster. Isn't there a Control Panel called something like "PowerBook Display"? (as an aside, if you have control panels that are incompatible with it, it sounds as though someone's done a "Universal install for any Macintosh" on there, which will mean there's lots of unnecessary stuff slowing it down and wasting the disk space, so a fresh installation of "68k software for this Mac" (or whatever exactly it's called in the Installer) would be recommended.