Ok, here's the deal. I'm trying to install a game (Diablo II), and I need a Classic environment to run the installer. Once the game's installed I'll be able to patch it to run natively in OS X via Carbon. I've only got OS X installed on my HD, and so I obviously need to install OS 9 to get the installer running. Here's my question. Can I just run the OS 9 installer and trust it not to overwrite the current system data? I've already tried to partition the HD using Disk Utility, but it says I'll have to reformat to partition. I'd really like to play this game, but I won't install OS 9 if I can't do it by simply adding on. Any tips here that I've just overlooked? Thanks for the help!