That's the install. You don't need to install the 32bit OS first. You just show the install the 32bit disk and you can do a clean install of the 64bit upgrade edition OS.Jintor said:...everywhere I've looked says you can't upgrade from a 32-bit system to a 64-bit system, it needs to be a clean install.
Read: http://www.winsupersite.com/article/windows-7/clean-install-windows-7-with-upgrade-media