title: getting native system32 on 64 bit os with inno setup running in 32-bit setup mode
body: <p>i have a DLL which should be installed as 32 bit AND 64 bit when setup running on 64 bit OS.
  I like to have Is64BitInstallMode no defined, so setup running in 32 bit mode.
  My problem: {sys} returns same as {syswow64}. So my setup does not copy the 64 bit version of
  the dll into native system32 folder on 64 bit os.</p>
  
  <p>How can i achieve that - even running in 32 bit install mode - on a 64 bit os a 32 bit binary
  is copied to {syswow64} and its 64 bit pendant copied to real-{sys} (so native 64 bit system32 folder).
  Thank you</p>