It is still valid in Vista x64 and Biztalk 2006. :D
Open your registry and look for the following hive:
HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\8.0now create a key named BiztalkProject
under this key, add a DWORD named GenerateCSFiles. Set the value to 1.
Now, close all instances of Visual Studio. Open a new instance of Visual Studio and create a Biztalk project
Build it. After it built, click on Show All Files:
Bingo, you will see the C# code: