As I mentioned on 68KMLA, 9.1 is too much for an old Mac like the 6200. I would recommend 7.6.1 since it's pretty lean compared to 9.1 (not as much memory requirements). If you need the contextual menu and some other features not found in 7.6.1 (like HFS+ support), then go Mac OS 8.1. Contrary to Windows, you don't always need to run the latest OS version on the Mac platform. Just the one that works the fastest.
Also, if you can make sure that you upgrade the RAM to its maximum (64 MB).
All of this is covered on the thread that you created over at 68KMLA.
Also, if you can make sure that you upgrade the RAM to its maximum (64 MB).
All of this is covered on the thread that you created over at 68KMLA.