Free dual display on the iMac G5

As on all products of the iXXX line, Apple willingly bridled the dual display function on their G5 iMacs.
The site Heise.de created an AppleScript which will free this functionality by patching the Open Firmware. Theoretically, it will be reactivated simply by zapping PRAM.
Caution, if you choose to use this patch, it wil be your own responsability:
Heise.de