So should I use this procedure?

Lan-Freeze issue

This is well known and should be fixed in Release V.2.
For now you can use the cpus=1 option at boot load, or permanently put it in the bootloader:

sudo nano /Library/Preferences/SystemConfiguration/com.apple.Boot.plist


And replace the current string with this one:

<key>Kernel Flags</key>
<string>-v -legacy cpus=1</string>

If your board has got 2 LAN Ports, then do not use the nForce one.

Install the proper drivers for your second Port, for example Marvell Yukon, and use it instead of nForce LAN. Also delete forcedeth.kext after you installed the drivers.
This will fix the Problem.

Also you can consider using Wi-Fi, which works as well.