My housemate just brought home a G4-400 system from his job. The whole corporate office is moving and so he was laid off and they let him have the computer. He wants to upgrade the hard drive size and get a DVD burner for it. Where can he go to buy this hardware? I have never had to buy hardware for a Mac computer and from my understanding, its not your normal hardware. Do you guys think that system would be good for video editing?