Yes, know how to get the setup, first go to the michael`s longhorn build 4029 download tutorial, and dowanload the file of the iso(rar file).
after that< open the file with winrar, so there will be other rar file, open it, so click 2 times in a row in SETUP.EXE, it will ask you if u want to dowanload longhorn , hope somebody do this!