Updated Windows build info.

README

@@ -686,10 +686,9 @@ however this assumes that you only need to add modules.)
 Building on non-UNIX systems
 ----------------------------
 
-For Windows 95/98 or NT, assuming you have MS VC++ 5.0 or 6.0, the
-project files are in PCbuild, the workspace is pcbuild.dsw.  (The
-project files are for VC++ 5.0, but VC++ 6.0 will convert them for
-you -- start VC++ and then use Open Workspace.)
+For Windows (2000/NT/ME/98/95), assuming you have MS VC++ 6.0, the
+project files are in PCbuild, the workspace is pcbuild.dsw.  See
+PCbuild\readme.txt for detailed instructions.
 
 For other non-Unix Windows compilers, in particular Windows 3.1 and
 for OS/2, enter the directory "PC" and read the file "readme.txt".