Source:
http://sc2.lancraftwc3.com/2011/07/starfriend-download-and-installation.html
StarFriend is still in beta and to use you need to have installed Taiwanese version of StarCraft 2 with patch 1.3.2
If you don't have Taiwanese version of Starcraft 2 you can download it here.
Installation
First download StarFriend (70MB)
Extract all files to StarCraft 2 game directory.
Now because game client is Taiwanese version all audio and text is Taiwanese, if you want to be in English you need to apply English patch.
Download English audio files (347MB)
Extract all files to StarCraft 2 game directory.
You have now installed StarFriend English version and you can now start LAN party.
How to use StarFriend
Game Host:
Before you start make sure that config file located in SC2 directory says that server IP address is your address (127.0.0.1 default)
If you are game host you need to start SarFriend Server first.
Start Server_0.44 located in SC2 directory /Server
Make sure you clicked Unblock for Windows Firewall or other player will not be able to join.
Now start StarCraft 2.
As username use
lan.sc2c@dark.blizzz and password gg
Game host need to connect first!
You will be named Slayer
Now to create game click Multiplayer Game, select Game Mode, Race and click Create Game
Chose map and create game.
I Game Lobby click + Players and invite players (other players first need to be connected to server to join)
Other Players
Other players to join game host's game need to add host's IP address to configuration file.
You need to edit config file located in SC2 directory
Replace 127.0.0.1 with game host's IP address.
Now start StarCraft 2, login: username
lan.sc2c@dark.blizzz and password gg . Now wait until game host invite you to game.
