Worked for me on my AMD system updating from XxX_10.5.6 with the voodoo kernel. I downloaded the stand alone installer from Apple and ran it through Zephyroth's AMD patcher just to be safe then backed up essential kexts... sound, video, etc. I had to replace the ATI drivers with the ones from my 10.5.6 install, but everything appears to be working fine.

HP Pavillion a1600n
AMD Athlon64 X2 3800+
2GB DDR2 RAM
200 GB SATA Hard Drive
ATI Radeon HD 2600 Pro PCI express
Voodoo kernel 9.5
ALC 888 HD Audio