Leopard 10.5.6 on AMD+Gigabyte

[ugant]

i have to install Leopard 10.5.6 into my PC
My Personal Computer is
AMD Athlon X64 5200+
Mobo Gigabyte GA-M720-US3 Chipset NVIDIA? nForce 720D
VGA Ati X1950 pro iceq 256bit - 128
DVD RW sata
HDD 160 gb sata
RAM 4 gb


last error :
with command after F8, -v
USBF : 0,695 AppleUSBOHCI I OX6371000UJ::CheckSleep Capability Controller will be unloaded across sleep
still waiting for root device
still waiting for root device


with command after F8, -v -x
Firewire (OHCI) TI ID 8024 PCI now active, GUID 006e0a7d00001d7d; max speed 5400
still waiting for root device

please help and thanks4All