I present a way to multiclient in the newest patch for the vietnamese version of BOI - Kiêm Tiên
The zip file contains 2 dlls.
Copy and replace when prompted.
Now you can open game by running game.exe, and the multiclient is working right away.
Max 3 clients is now removed...
Enjoy!
EDIT:::: Added a newer version, which might fix the problem for some.. Pick the newest version dated 19.october.2012
If you get error regarding missing msvcr100d.dll please install Windows Visual C++ Runtime Library v10.0.
You can get this *directly* from Microsoft, which is obviously the BEST, and SAFEST place to retrieve it from:
x86:
x64: