for Asrock K10N78M motherboard, (nVIDIA MCP78 - LAN Controller (PHY: Realtek RTL8211/8212)" PCI
Maybe work on other motherboards with this LAN Controller.
Delete your nForceLAN.kext in S/L/E,
and copy my kext.
Run Kext Utility, whait, and restart your Hakintosh)
This kext from 10.6.0. , but work in 10.6.8 and 10.7.3, in others versions not tested.
Sorry for my English, I am from Ukraine:)