Simplify MSI projects.
diff --git a/Tools/msi/lib/lib.wixproj b/Tools/msi/lib/lib.wixproj
index e9281da..64e5878 100644
--- a/Tools/msi/lib/lib.wixproj
+++ b/Tools/msi/lib/lib.wixproj
@@ -5,7 +5,30 @@
         <SchemaVersion>2.0</SchemaVersion>
         <OutputName>lib</OutputName>
         <OutputType>Package</OutputType>
-        <DefineConstants>IncludeDefaultFeature=1;$(DefineConstants)</DefineConstants>
     </PropertyGroup>
-    <Import Project="lib.props" />
+    <Import Project="..\msi.props" />
+    <ItemGroup>
+        <Compile Include="lib.wxs" />
+        <Compile Include="lib_files.wxs" />
+    </ItemGroup>
+    <ItemGroup>
+        <EmbeddedResource Include="*.wxl" />
+    </ItemGroup>
+    <ItemGroup>
+        <ExcludeFolders Include="Lib\test;Lib\tests;Lib\tkinter;Lib\idlelib;Lib\turtledemo" />
+        <InstallFiles Include="$(PySourcePath)Lib\**\*"
+                      Exclude="$(PySourcePath)Lib\**\*.pyc;
+                               $(PySourcePath)Lib\**\*.pyo;
+                               $(PySourcePath)Lib\site-packages\README;
+                               @(ExcludeFolders->'$(PySourcePath)%(Identity)\*');
+                               @(ExcludeFolders->'$(PySourcePath)%(Identity)\**\*')">
+            <SourceBase>$(PySourcePath)Lib</SourceBase>
+            <Source>!(bindpath.src)Lib\</Source>
+            <TargetBase>$(PySourcePath)Lib</TargetBase>
+            <Target_>Lib\</Target_>
+            <Group>lib_py</Group>
+        </InstallFiles>
+    </ItemGroup>
+    
+    <Import Project="..\msi.targets" />
 </Project>
\ No newline at end of file