Prerequisites:

The following solution should be built on a development machine with: 

a) Visual Studio 2005 and BizTalk 2006 installed.

Extract BTSMessageHelper.zip to the root of the C:\ drive

The following folders should be created:

C:\BTSMessageHelper\BTSClassHelper
C:\BTSMessageHelper\BTSTestMessageHelper
C:\BTSMessageHelper\Files

Install and run the sample
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1) Navigate to folder:
C:\BTSMessageHelper

Open Visual Studio Solution:
BTSMessageHelper.sln

For the BTSTestMessageHelper BizTalk project, 
check Deployment property page for correct Server and Configuration Database
(Right mouse button on the BTSTestMessageHelper project in Visual Studio and 
choose Properties in the pop up menu. In the dialog choose -> Configuration Properties -> Deployment)


2) Deploy

In Visual Studio right mouse button on Solution 'BTSMessageHelper' 
and in the popup menu choose -> Deploy

This will build both projects in the solution,deploy the BTSTestMessageHelper BizTalk project and 
GAC the C# class project -> BTSClassHelper.

Using the BizTalk 2006 Administration console, ensure that an Application called 
BTSTestMessageHelper was created.

3) Import the Binding file and Start Application

Using the BizTalk 2006 Administration console, navigate to the 
BTSTestMessageHelper application. Right mouse button on the 
BTSTestMessageHelper application and in the popup menu choose:
Import -> Bindings

In the Import Bindings Dialog box, navigate to folder:
C:\BTSMessageHelper

and then choose file:
bindings.xml

Right mouse button on the BTSTestMessageHelper application and choose 
Start in the popup menu to start the application.

4) Test

Navigate to folder:
C:\BTSMessageHelper\Files

Copy file:
Request.xml

To folder:
C:\BTSMessageHelper\Files\ReceiveMsg

Navigate to Folder:
C:\BTSMessageHelper\Files\SendMsg

The resultant output xml file should be dropped to the above folder

To determine how things work, please examine the two Visual Studio projects and visit:
http://objectsharp.com/cs/blogs/matt/archive/2007/04/17/biztalk-message-helper-methods.aspx