I have g5 tower with 23" flat screen and I also have powerbook 17". Can I connect them so that I can run the powerbook display as a second monitor - video mirroring or extended desktop mode????? if so, how?
At least, not without doing some facy VNC stuff or emulation. This program may get you somewhere close to what you want: http://www.abyssoft.com/software/teleport/
But I think it's going to be similar to remote-controlling the PowerBook rather than using it as a 2nd monitor to another computer.