I did notice this. Try giving LawlessPPC 10.5.4 a try.

LawlessPPC-10 5 4-Phenom-AMD
This image is a remixed Zephyroth 10.5.2 rev2 release.
If this DVD does not boot on your system then its not meant to be installed on your system!!!

Changes to Zephyroth release are as follows.

*** Chameleon bootloader Ver 1.0.11 (used for DVD booting & installed on drive by default.)
*** Modbin 9.4.0 Kernel SSE3 (installed by default)
*** Alc888 (audio) 3 port, 6 ports + Digital (Fixed)
*** NTFS-3G latest version (solves slow shutdowns)
*** ATI SB600 Issue (solves still waiting for root device when trying to install)
*** ATI HD-3650 Support (QE/CI Enabled) No white menus!!!)

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MOBO: Z77MX-QUO-AOS CPU: Core i7 3770K GPU: MSI N760 TF 2GD5/OC Case: Modded MacPro2,1
Memory: 32GB Corsair Vengeance (CMY32GX3M4A1600C9) Wifi: Airport Extreme bcm94321MCA BIOS: HermitCrab Labs H3A.816M
Monitor: AOC Q2963Pm 29" WFHD 2560x1080 21:9
Interests: KDE on Apple Darwin, Keeping it real with the command line, Helping those that help themselves