http://www.winsupersite.com/article/windows-7/install-windows-7-with-a-u*****-memory-key
http://www.microsoftstore.com/store/msstore/html/pbPage.Help_Win7_u*****dvd_dwnTool
http://www.maximumpc.com/article/howtos/how_to_install_windows_7_beta_a_u*****_key