'win32/*.bat', harcoded path to 'vcvars32.bat' might be a bad idea

'win32/*.bat' all contain:
  call "c:\program files\microsoft visual studio\vc98\bin\vcvars32.bat"
maybe this should be replaced with:
  call "%MSDevDir%\..\..\vc98\bin\vcvars32.bat"
or (if we assume it is pathed, since later on we see just 'msdev' without a 
path):
  call vcvars32.bat