diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index eb92b41..53645a7 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -158,10 +158,12 @@
 /* set the version macros for the windows headers */
 #ifdef MS_WINX64
 /* 64 bit only runs on XP or greater */
-#define Py_WINVER 0x0501
+#define Py_WINVER _WIN32_WINNT_WINXP
+#define Py_NTDDI NTDDI_WINXP
 #else
-/* NT 4.0 or greater required otherwise */
-#define Py_WINVER 0x0400
+/* Python 2.6+ requires Windows 2000 or greater */
+#define Py_WINVER _WIN32_WINNT_WIN2K
+#define Py_NTDDI NTDDI_WIN2KSP4
 #endif
 
 /* We only set these values when building Python - we don't want to force
@@ -171,7 +173,10 @@
    structures etc so it can optionally use new Windows features if it
    determines at runtime they are available.
 */
-#ifdef Py_BUILD_CORE
+#if defined(Py_BUILD_CORE) || defined(Py_BUILD_CORE_MODULE)
+#ifndef NTDDI_VERSION
+#define NTDDI_VERSION Py_NTDDI
+#endif
 #ifndef WINVER
 #define WINVER Py_WINVER
 #endif
diff --git a/PC/readme.txt b/PC/readme.txt
index f1db9d3..b5a5a87 100644
--- a/PC/readme.txt
+++ b/PC/readme.txt
@@ -1,11 +1,6 @@
 Welcome to the "PC" subdirectory of the Python distribution
 ***********************************************************
 
-*** Note: the project files for MS VC++ 7.1 are now in the
-*** PCbuild directory.  See the file readme.txt there for build
-*** instructions.  There is some information below that might
-*** still be relevant.
-
 This "PC" subdirectory contains complete project files to make
 several older PC ports of Python, as well as all the PC-specific
 Python source files.  It should be located in the root of the
@@ -79,18 +74,23 @@
 example_nt     A subdirectory showing how to build an extension as a
                DLL.
 
-Visual Studio 6.0
-=================
-The subdirectory VC6 contains Visual Studio 6 project files. These
-were originally located in the PCBuild directory, but are no longer
-maintained.
+Legacy support for older versions of Visual Studio
+==================================================
+The subdirectories VC6, VS7.1 and VS8.0 contain legacy support older
+versions of Microsoft Visual Studio. See PCbuild/readme.txt.
 
+EMX development tools for OS/2
+==============================
+
+See os2emx/readme.txt. This platform is maintained by Andrew MacIntyre.
 
 IBM VisualAge C/C++ for OS/2
 ============================
 
 See os2vacpp/readme.txt.  This platform is supported by Jeff Rush.
 
+NOTE: Support for os2vacpp may be dropped in the near future. Please move
+      to EMX.
 
 Note for Windows 3.x and DOS users
 ==================================
diff --git a/PCbuild/build.bat b/PCbuild/build.bat
index d181daf..a73560e 100644
--- a/PCbuild/build.bat
+++ b/PCbuild/build.bat
@@ -5,12 +5,13 @@
 setlocal
 set platf=Win32
 set conf=Release
-set build=/build
+set build=
 
 :CheckOpts
-if "%1"=="-c" (set conf=%2)     & shift & shift & goto CheckOpts
+if "%1"=="-c" (set conf=%2) & shift & shift & goto CheckOpts
 if "%1"=="-p" (set platf=%2) & shift & shift & goto CheckOpts
-if "%1"=="-r" (set build=/rebuild)    & shift & goto CheckOpts
+if "%1"=="-r" (set build=/rebuild) & shift & goto CheckOpts
+if "%1"=="-d" (set conf=Debug) & shift & goto CheckOpts
 
 set cmd=vcbuild /useenv pcbuild.sln %build% "%conf%|%platf%"
 echo %cmd%
diff --git a/PCbuild/pyd.vsprops b/PCbuild/pyd.vsprops
index 2e21a80..726cebd 100644
--- a/PCbuild/pyd.vsprops
+++ b/PCbuild/pyd.vsprops
@@ -7,6 +7,7 @@
 	>
 	<Tool
 		Name="VCCLCompilerTool"
+		PreprocessorDefinitions="Py_BUILD_CORE_MODULE"
 		RuntimeLibrary="2"
 	/>
 	<Tool
diff --git a/PCbuild/pyd_d.vsprops b/PCbuild/pyd_d.vsprops
index b8f98f6..f838b67 100644
--- a/PCbuild/pyd_d.vsprops
+++ b/PCbuild/pyd_d.vsprops
@@ -10,6 +10,7 @@
 		Optimization="0"
 		InlineFunctionExpansion="0"
 		EnableIntrinsicFunctions="false"
+		PreprocessorDefinitions="Py_BUILD_CORE_MODULE"
 		RuntimeLibrary="3"
 	/>
 	<Tool
diff --git a/PCbuild/readme.txt b/PCbuild/readme.txt
index 2b2d1f8..f8b3f65 100644
--- a/PCbuild/readme.txt
+++ b/PCbuild/readme.txt
@@ -19,7 +19,7 @@
 won't stop you from building Python.
 
 The solution is configured to build the projects in the correct order. "Build
-Solution" or F6 takes care of dependencies except for x64 builds. To make
+Solution" or F7 takes care of dependencies except for x64 builds. To make
 cross compiling x64 builds on a 32bit OS possible the x64 builds require a 
 32bit version of Python.
 
@@ -30,7 +30,8 @@
    running a Python core buildbot test slave; see SUBPROJECTS below)
 
 When using the Debug setting, the output files have a _d added to
-their name:  python30_d.dll, python_d.exe, parser_d.pyd, and so on.
+their name:  python30_d.dll, python_d.exe, parser_d.pyd, and so on. Both
+the build and rt batch files accept a -d option for debug builds.
 
 The 32bit builds end up in the solution folder PCbuild while the x64 builds
 land in the amd64 subfolder. The PGI and PGO builds for profile guided
@@ -122,6 +123,8 @@
 
     Use x64 instead of Win32 for the x64 platform.
     
+    NOTE: Tcl/Tk 8.4 doesn't compile for x64.
+    
     Build Tcl first 
     ---------------
     Use "Start -> All Programs -> Microsoft Visual Studio 2008
@@ -285,7 +288,7 @@
 
 NOTE:
 Official support for Itanium builds have been dropped from the build. Please
-contact as and provide patches if you are interested in Itanium builds.
+contact us and provide patches if you are interested in Itanium builds.
 
 The project files support a ReleaseItanium configuration which creates
 Win64/Itanium binaries. For this to work, you need to install the Platform