code: def find_versions():
      
      versions = []
  
      ### This function finds CodeWarrior by reading from the registry on
      ### Windows. Some other method needs to be implemented for other
      ### platforms, maybe something that calls env.WhereIs('mwcc')
  
      if SCons.Util.can_read_reg:
          try:
              HLM = SCons.Util.HKEY_LOCAL_MACHINE
              product = 'SOFTWARE\\Metrowerks\\CodeWarrior\\Product Versions'
              product_key = SCons.Util.RegOpenKeyEx(HLM, product)
  
              i = 0
              while True:
                  name = product + '\\' + SCons.Util.RegEnumKey(product_key, i)
                  name_key = SCons.Util.RegOpenKeyEx(HLM, name)
  
                  try:
                      version = SCons.Util.RegQueryValueEx(name_key, 'VERSION')
                      path = SCons.Util.RegQueryValueEx(name_key, 'PATH')
                      mwv = MWVersion(version[0], path[0], 'Win32-X86')
                      versions.append(mwv)
                  except SCons.Util.RegError:
                      pass
  
                  i = i + 1
  
          except SCons.Util.RegError:
              pass
  
      return versions
docs: Return a list of MWVersion objects representing installed versions