According to everymac.com, your machine came with 9.2.2 and 10.2.4 installed. (Maximum OS is 10.4.11.) You should be able to use a generic OS 9.2.2 CD which does a clean install on any Mac capable of running the OS. I have the clean install OS 9.2.2 CD which I picked up at the Apple store and have made a .toast image of it. I can easily put it into my Dropbox account for you to download. You can then burn your own CD. Let me know!