Upgrade to vsextcomp 0.8 (and thus the SDK for W2k3SP1)
diff --git a/PCbuild/_tkinter.vcproj b/PCbuild/_tkinter.vcproj
index f33f7f8..57b7606 100644
--- a/PCbuild/_tkinter.vcproj
+++ b/PCbuild/_tkinter.vcproj
@@ -133,7 +133,7 @@
 				AdditionalOptions=" /USECL:MS_ITANIUM"
 				Optimization="2"
 				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="{MSSDKPATH}\include\Win64\atl;{MSSDKPATH}\include\Win64\crt;{MSSDKPATH}\include\Win64\crt\sys;{MSSDKPATH}\include\Win64\mfc;..\..\tcltk\include,..\Include,..\PC"
+				AdditionalIncludeDirectories="..\..\tcltk\include,..\Include,..\PC"
 				PreprocessorDefinitions="NDEBUG;WIN32;_WINDOWS;WITH_APPINIT"
 				StringPooling="TRUE"
 				BasicRuntimeChecks="0"
@@ -195,7 +195,7 @@
 				AdditionalOptions=" /USECL:MS_OPTERON"
 				Optimization="2"
 				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="{MSSDKPATH}\include\Win64\atl\amd64;{MSSDKPATH}\include\Win64\crt\amd64;{MSSDKPATH}\include\Win64\crt\amd64\sys;{MSSDKPATH}\include\Win64\mfc\amd64;..\..\tcltk\include,..\Include,..\PC"
+				AdditionalIncludeDirectories="..\..\tcltk\include,..\Include,..\PC"
 				PreprocessorDefinitions="NDEBUG;WIN32;_WINDOWS;WITH_APPINIT"
 				StringPooling="TRUE"
 				BasicRuntimeChecks="0"