As of 10.4.3 or so, this hack stopped working and started rendering machines unbootable. Please do not try to run this software on 10.4.3 or above. If you have and you want to get your machine working again, you need to take:
PCI Extreme 3.1/PCI Extreme.app/Contents/Resources/CoreGraphics
You can do this in single user mode with the CP command, with a boot CD like DiskWarrior or TechTools, or you can boot the sad Mac into FireWire disk mode and use another Mac to copy the file over More...
Version 3.1: Improved Tiger support. No longer relies on binary difference patches or MD5 sums. No more "binary unsupported" messages. Certified safe for 10.4.0. At your own risk for future releases (unless this is updated by then, of course!)
Mac OS 10.2 or later, except for 10.3.7