sinclair_tm

How did you delete the partition? You should of booted from the OS X install DVD that came with the Mac and let it repair your OS X install. Now I have a feeling you will only be able to reformat the whole hard drive and start over. To do that you will need to stick the OS X install DVD in, turn the Mac on, and hold down the option as soon as you hear the bong. Keep it held until you get icons of the bootable disks. Click on the DVD icon and then it should go.