On a *nix system, bdist_wininst.get_exe_bytes will always return an open  wininst-6.0.exe.

However, Windows python2.7 is compiled against msvc 9.0 and ideally would take an installer based on wininst-9.0.exe.  Windows-64bit needs an installer based on wininst-9.0-amd64.exe.

The ideal solution would be for bdist_wininst to take an option what "template exe" to be used. While I've monkey-patched things on my own, I'm not providing a patch as I'm not sure how the community wants to handle this (it could be anywhere from the exe name to tables being driven by target_version and some some 64bit option)