Yes, I have both held down and not held down the C key for over 5 minutes. I have tried installing from another mac, as well as from an external Disk Drive with both USB and Firewire Ports. I know that the Internal Superdrive and External Disk Drive works. Firmware is not an issue. I have tried installing with nothing connected to the iMac. I have reseted the PMU, VRAM, PRAM. I have tried numerous keyboards. I have left it alone and tried again later. I have tried different versions of OS's, of which 10.2 and below don't work.

I have exhausted all of my options. This thing simply refuses to install, no matter what. I have done everything above with both copies of 10.2 (Which were tested on another mac).

Any other suggestions?