I have a system instal with Zephyroth Leopard Amd 10.5.2 Rev.2.
From DVD :

Toh kernel 9.2.0
Med.vil Nforce 2,3,4,5 chipset driver
Skge driver for Lan.
Graphic: Nvidia 10.5.2 kexts and NVinject 256 Mb
File systems NTFS (I've got IDE drive for the operation system, the sata drive (NTFS) i use for XP)
Bootloader, single boot, Darwin MBR EFI V8

Then at startup i installed (i found these kexts on internet, mostly on insanelymac and infinitemac.);

Ionetworking.kext and NforcEthernet driver.
Now i have my internet running, but still get kernel panics.
And network fails to connect, i can't connect to other computer.

After this i updated the kernel, 9.2.2 kernel + system kexts. But still internet panics, and don't have connection to the network.

After i did the AMD updater to 10.5.5, my network connected to the network, a windows machine.

From there i've updated kernel, Voodoo 9.5 Kernel + 9.5 system.kexts.
Modified "About this mac."
The system runs very smoothly, and it's only the internet and network that causes those panics.