So I got my MDD, and an OWC SATA SSD with an IDE adapter. My goal is to install OS 10.3 and OS 9 on partitions on the SSD, and use the original HDD for a later OS or something that strikes my fancy. After fiddling, I got the SSD installed, although in the process the original hard drive disappeared from the boot options (I swapped their position in the drive cage, so I'm wondering if this has anything to do with the master/slave status, but it's probably just a loose power connector or something. I partitioned the drive using the 10.3 install discs, although I realized that my discs are upgrade only and I need another copy of OS X. Apparently my Jaguar discs are also upgrade only. D'oh. Installing OS X will have to wait. My real problem begins when I try and install OS 9, however. I inserted a 9.2.2 disc, but it threw up an error when I booted from it—I have to install 9.1 first to upgrade. I go to the 9.1 disc, but I can't boot too it—I get the Mac/flashing folder icon. I go back to the 9.0 disc, but get the same issue—doesn't show up as a boot option when pressing the C key or Opt. There don't appear to be any serious scratches in the discs, so I'm wondering if I'm missing something regarding the installation. The obvious answer to me is the MDD don't support the earlier versions of OS 9, but then the question is whether it's possible to install OS 9 without the system restore discs for the model.