win32: update build instructions with correct CRT version As stated in http://msdn.microsoft.com/en-us/library/cc664727.aspx, when you compile an application with MSVC 2008 SP1 it is bound by default to the original CRT version (9.0.21022.8). This is the case for Python 2.6 up to 3.1. If the wrong CRT version is embedded in the Inno Setup installer, with a PC that does not have the MSVC 2008 redistributable package installed, hg will refuse to launch with an error: "the system cannot execute the specified program".