Gizmodo has a long, detailed write-up of how to convert a Dell Mini 9 into a full-fledged Mac OS-X netbook, cool. I don’t really recommened doing that but if you want a Mac netbook on the cheap, this might be a great way to do just that.
The easiest way to use both the Type11 bootloader (burned to a bootable CD) and your OS X install DVD is via the external USB DVD drive. The catch is, some drives are mysteriously not compatible with installing OS X on the Mini 9. Mine was one of those drives—the bootloader CD would work without a hitch, but it would choke on the OS X install disk every time. Thankfully, it’s also possible to run both the bootloader and the OS X install disk off of a USB flash drive. I’m going to spell out my method here, which actually included both approaches, but try an external DVD drive first, and if yours is compatible, your life will be a little easier than mine was. On the other hand, if you don’t have an external drive, you can give the USB flash drive method a shot.