Hi all!

I'm sorry! My English very bad!

You must download and install two tools

DotNetNuke StarterKit from dnn site

WebDeloyment from http://msdn2.microsoft.com/en-us/library/aa479568.aspx

Example: you created new Module, name is ModuleTest and dnn virtual directory is dnn4

Step 1: Add
<codeSubDirectories>
        <add directoryName="HTML" />
        <add directoryName="ModuleTest" />
</codeSubDirectories>

in Webconfig file.  

Step 2:
Run -> cmd

run aspnet_compiler -v /dnn4 -u c:\dnnprecompiled -fixednames from command line mode

command aspnet_compiler in C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727,

Step 3:
run aspnet_merge -a c:\dnnprecompiled from command line mode

command aspnet_merge in C:\Program Files\MSBuild\Microsoft\WebDeployment\v8.0 after install WebDeloyment

Step 4:

Copy App_SubCode_ModuleTest.dll, DesktopModules.ModuleTest.dll in c:\dnncompiled\bin and copy ModuleTest directory in c:\dnncompiled\DesktopModule. Now, you're packed ModuleTest

Note:  test dnn ModuleTest After compiled

copy two dll file to bin directory of dnn4 site, delete sub directory ModuleTest in directory App_code, delete dnn4\DesktopModule\ModuleTest, copy ModuleTest from c:\dnncompiled\DesktopModule to dnn4\DesktopModule, delete  <add directoryName="ModuleTest" /> in Webconfig file.

if you can't test and error  is "can not load file or assemly ...", you need download hotfix from Microsoft site "NDP20-KB915782-X86.exe" file

Good luck!