So I Have the same motherboard as you. I downloaded the LawlwssPPCPhenom .ISO. I Unplugged all of my SATA Hard drives and plugged the IDE drive in as slave, and then the DVD drive in as master. All the kexts load and it still gets the "Still waiting for root device" loop. It is also getting hung up on my USB ports plugged into my mobo. So I tried unplugging those. Still no luck. LEt me know what you think. You are the first person I've come across who has my motherboard. Let's work together on this.

One thought I have is using the kexts for the phenom from the LawlessPPC and putting them in the iAtkos4A install. That install disc has gotten the furthest for me. It sees the disc, and installs. It just does not boot after the install. Just a thought. I would not know where to begin doing such a thing but it's a thought.