My brother's got a Performa 6214CD we got from a university. It's nice for its time, (64 MB RAM, 1 GB HDD, I added an Ethernet card), but came with OS 9 on it, and I would rather it run in Mac OS 8.5 (I have an 8.5 install CD I purchased in the '90s) but I can't find the Installer CD, so I was...