Well known to most hackers, some video cards that Apples builds into the iMac and iBook line are capable to support full and independent dual screen. But Apple choose to cripple this feature down to a screen mirror. To make a gap to the G5 lacking PowerBooks.

The leading german language computer magazine c't that hasn't forgotten the Mac users has put the OpenFirmware hack into an Applescript for easy use. You can download the script at http://www.heise.de/ct/04/23/links/020.shtml.

You can reset or uninstall the hack with the installer script or by resetting the OpenFirmware (apple-option-p-r) at booting.

Now it's possible to extend the iMac G5 with anouter 15 or 17" TFT and you'll have enough real screen to do your work.