Got it going. Not on the SATA though. even got it dual booting now> thnaks for hte help. A few more drivers to go yet.

Hi drwhose,
I have the same motherboard with you, could you mind to share your bios setting with me?
When I use boot the computer with the Zephyroth Leopard 10.5.1 or 10.5.2 it hang.

-v -x it shows:
EFI enhanced bootloader build: ToH
Using SMBIOS table found at 0x000fbdb0
Using ACPI RSDP revision 0 found at 0x000fa7c0
Hey we are going backwards! -> , restarting timing
Hey we are going backwards! -> , restarting timing
Calibation failed with 2 attempts

THANKS~!

cant install leopard (Zephyroth Leopard rev. 1) on my config:

gigabyte GA-M55plus-S3G with latest bios
amd AM2 4000+
2 G mem
160 + 160 sata hdd
ide dvd-rw
geforce 7900gt

immediately after reboot from dvd i receive kernel panic (Local APIC version not 0x14 as expected blah-blah-blah)

could anybody install leo at the same config?..