[Editor's note: See the comment for the answer to identifying the installed files]
I took the lazy route: used a clean partition for the OS X install but used my 'everyday' System 9.1 on the other of the two partitions for the Classic environment. Now I'm rethinking this strategy, or lack thereof, and I'd like to put a minimal OS 9.1 on the same partition as OS X for the purposes of running in Classic mode. No problem there, but I'd also like to clean out my 'everyday' 9.1 of OS X files and extensions: Is there a list of these files and their locations somewhere?
Mac OS X Hints
http://hints.macworld.com/article.php?story=20010326191722670