I bought a macbook pro 17 from ebay. The guy sent me a preinstalled tiger on the macbook pro. He also sent me two startup/backup disks with it. Now I want to format my macbook pro and install everything clean. Leopard DVD wont allow me to perform a clean install. And the restore/backup cd's dont just seem to work. It says Tiger on the DVD's but when I insert it in my mac, the installer starts and it gives me a warning "This software cannot be installed on this Mac" I think the guy gave me the wrong DVD. Is there any other way to format it. I do have the two restore/backup DVD's and I also have a Leopard upgrade DVD. Is there a way I can format my hard drive and install everything clean again?