anchor.diff:  :: can extract the iso we just downloaded and run its setup.
   :install_vmware_tools_from_iso
   call :install_sevenzip
  -if errorlevel 1 goto exit1
  +if errorlevel 1 (
  +  echo ==^> ERROR: Failure trying to install 7-zip archiver
  +  goto exit1
  +)
   
   :: Now that we have the iso, we can extract it with 7-zip and make sure its got
   :: everything that we're looking for.
  
positive.code: @for %%i in (%PACKER_SEARCH_PATHS%) do @if not defined PARALLELS_ISO_PATH @if exist "%%~i\%PARALLELS_ISO%" set PARALLELS_ISO_PATH=%%~i\%PARALLELS_ISO%
  REM parallels tools don't have a download :(
  call :install_sevenzip
  if errorlevel 1 goto exit1
  
  echo ==^> Extracting the Parallels Tools installer
  echo ==^>   to %PARALLELS_DIR%\*
  
negative.code: :: to the correct place.
  set _VMWARE_TOOLS_SIZE=0
  if defined VMWARE_TOOLS_ISO_PATH for %%i in (%VMWARE_TOOLS_ISO_PATH%) do set _VMWARE_TOOLS_SIZE=%%~zi
  if defined _VMWARE_TOOLS_SIZE if not "%_VMWARE_TOOLS_SIZE%" == "0" set VMWARE_TOOLS_ISO_URL=
  if not defined VMWARE_TOOLS_ISO_URL goto install_vmware_tools_from_iso
  
  echo ==^> Downloading the VMware tools from %VMWARE_TOOLS_ISO_UrL%
  
  call "%SystemRoot%\_download.cmd" "%VMWARE_TOOLS_ISO_URL%" "%VMWARE_TOOLS_ISO_PATH%"
  if errorlevel 1 (
  