Actually, the way I had to do it was to get it to recognize something in my office as a “Startup Disk”. Having already purchased a MacBook Pro in September, I updated the G5 by putting the dual-layered install DVD into the MacBook, and taking the laptop into “Target Disk Mode” (System Preferences, Startup Disk on the MacBook Pro).
I plugged it into the Firewire 400 slot, and the G5 recognized it as a “Startup Disk” (System Preferences, Startup Disk on the G5).
Voila!!!
Darren Williams
Hawkeye Productions
http://www.hawkeyeproductions.com